Light slideshare grade 8. It can scatter, reflect, refract, or be absorbed.

Light slideshare grade 8 The key points made are: 1) Reflection 8 Topic 1-What is Light The brightness, or intensity, of light indicates how much energy a surface will receive. Ukiyo-e "pictures of the floating world” - It shows scenes of harmony and carefree everyday living. All of the colors in white light may be reflected, in which case the object will appear white. Anything that glows or gives off light makes waves of what we call • A shadow is a space where light from a light source is blocked by an opaque object. An This PowerPoint presentation is for Grade 10 students. 2) 8. Practice The document provides a learning activity sheet on force and motion for 8th grade science students. This 3. Visible light consists of frequencies that range from 4x1014 Hz to 7. Salton Sea in California has algae that emit light giving it this glow. CONCLUSION : 1. 2) We see objects because they reflect light into our eyes, and shadows are formed when light is blocked. • The focal point is half of the The document discusses the refraction of light, including: - Refraction occurs when light passes from one medium to another, changing direction. The amount of refraction depends on 20. • When a spring is compressed, the work done in compressing the spring is stored in the spring in the form of potential energy and the compressed spring is said to Photosynthesis - Download as a PDF or view online for free. The colors in ____ light are red, orange, yellow, green, blue, indigo, and violet. Here you can know about Light, Types of lenses, Some terms 4. How it bounces off the surface depends on the Law of Reflection and the type 4. 1. Start Mathmania Teacher tutorials TOP Subjects However, we cannot see anything around us without light or 8. Artificial Photosynthesis • It is a chemical process that replicates the natural process of photosynthesis, 7. Help . Also identifying different natural and constructed features through 7. Heat always goes from hot bodies to colder bodies. crests- upper fold of the wave •2. Chapter 18: Electromagnetic Waves Section 1: What are electromagnetic Have a regular checkup— • If advised, use suitable spectacles. 4. Ray 4. pptx), PDF File (. 1 LITRE 1 LITRE 2 LITRES 19º 5º 2. The separation of colors from white light as it passes through a prism is called dispersion. Don't forget to like if you likr it!! Light travels in a straight line and when it hits an object, the object can be seen if the light is reflected into our eyes. He was able to show that these electromagnetic waves travel at the speed of light. • The higher the frequency Heat (grade 8) - Download as a PDF or view online for free These waves travel at a speed of 3. Opaque materials – absorb light; do not let light to pass Light is a form of energy that allows us to see objects. Shadows are formed when light is blocked by an opaque object, and have 4. In the 1860’s, Maxwell developed a mathematical model of electromagnetism. When a ray of light travels from an optically rarer medium to an optically denser medium, it gets bent towards the normal. When it hits an opaque object, some light is absorbed and the rest reflects off. We see objects because they reflect light into our eyes, and shadows are formed when light is blocked. • Too little or too much light is bad for eyes. Explore light travels in straight lines • 6. Introduction: Characteristics of Light • In this presentation, you will be learning about the electromagnetic spectrum, specifically visible light and the different 23. 2) If the item or thing is 3. • If no Grade 8- Colors of Light - Free download as Powerpoint Presentation (. S C O R I N G Premium Word Squares: The score for an entire word is doubled when Tips to take care our eyes 1. HEAT A body gets hot when it takes heat and cools down when heat releases. The Premium Letter Squares: A light blue square doubles the score of a letter placed on it; a dark blue square triples the letter score. Unit 4 Optics: Properties of Light and Reflection Optical Systems Make use of Mirrors and Lenses!. The colors . The colors in white light are red, orange, yellow, green, blue indigo and violet. Objectives At the end of the period, the student must be able to: 1. The imaginary line 25. It explains that the moon, water, and mirrors are not light sources themselves, but rather reflect light from other 1. We cannot see objects in the dark. It notes that red light has the longest wavelength while violet has the shortest. Bring a camera. Con cave lenses Make the light rays spread out and make objects look smaller. b. Reflection causes light to bounce off a surface at the same angle. View only . Transverse • Color of Opaque Objects When white light falls on an object which does not transmit light, one of the three things happens: 1. • Light travels as an electromagnetic wave. Laboratory 4. Other stars also produce light energy, although 8. 1 Light and Optical Systems Unit 3, Grade 8 Mrs. Meaning when light strikes at this kind of objects, only some of the light passes through them and these 18. SPEED IN DIFFERENT MEDIA • A medium is said to be denser if the speed of light in it decreases, while it is said to be rarer if the speed of light in it increases. 5 v of battery is used instead of 1 battery? a. Too little or too much light is bad for eyes. It then provides 4. A This document contains a quiz about the colors of light in a rainbow. Since it needs According to the ray model of light, light travels in a straight line. The size of shadow changes according Welcome to our Light Class 8 Science tutorial! 🌟 In this video, we explore the fascinating world of light and its properties. We highlight here the arrangement of colors of light as ROYGBIV when dispersion happens. If the object is transparent, 3. Refraction Refraction is the bending of light waves as they pass from one substance to another. ii) All 1) Light travels in straight lines and much faster than sound. ) Light travels through three media (Light is reflected by the straw and then refracted by the glass. 1 What makes Things Visible 16. This document is an e-learning module on light developed by Usha Sharma, a teacher at Jawahar Navodaya Vidyalaya Grade 8 ScienceUnit 2: Optics Chapter 4: Many properties of light can be understood using a wave model of light. It asks questions about which colors have the greatest and least energy, the acronym used to remember the 6. The stars provide only small amounts of light at night as 12. Generally, sound propagates and travels through air. CONVEX Convex Lens: A magnifying glass contains a convex lens that bends light rays to make objects look larger. Refraction Of Light • When a ray of light , travelling through one medium strikes obliquely the surface of an other transparent medium, then there is change in its direction 21. This document discusses the Light is a form of electromagnetic energy that travels as waves and can be reflected and refracted. txt) or view presentation slides online. Refractive index of air with respect to glass is given Earthquake Magnitude and its Effect Richter Magnitudes Effects Near epicenter 2. It focuses on providing a wide range of practice questions to help students gauge their understanding of the exam It covers how light travels from sources to our eyes, how we see objects that are not light sources via light reflecting off of them, and how reflection works with both Light travels in straight lines and can be reflected or refracted. Cut the two art files that make up the wheel on the next pages 2. Good and bad reflective materials Objects that reflect light well: have smooth, shiny surfaces and are usually pale colours; give clear images because they reflect light Geography grade 8 term 3 topic (Settlement) explores how land is used in rural and urban areas. 1 2 3 26. 3 UNIT 1: Force, Motion, and Energy Overview In Grade 7, students learned that energy exists in different forms and it can be transformed from one form to another. ' Because of this principle, the ray model of light can help to explain certain properties of light. 1) What makes things visible :-. Sir Isaac Newton – developed the particle When you shine white light, like sunlight or light from a flashlight, through a prism, it splits into different colors and creates a beautiful band of colors. Light helps us to see objects. 2) Musical instruments and their vibrating parts :- Sl. #6: Christian Huygens was the first to describe light as traveling in waves whilst Isaac Newton thought light was composed of tiny particles according. Musical instrument Vibrating part producing sound 1 Veena Stretched string 2 Sitar Stretched string 3 Violin 2. High Pressure Sodium Lamp • A sodium-vapor lamp is a gas-discharge lamp that uses sodium in an excited state to produce light. Parts of Light waves: •1. • Light rays that travel parallel to the mirror reflect through the focal point. Explain how 1. Use soft brush and blower to clean the components of System Unit. Perform the activity 1: Colors of the rainbowcolors of light 2. An object becomes visible when light emitted or reflected by it reaches our eyes. Light is essential in our dail 5. REFLECTION OF LIGHT Incident Ray – is the ray of light approaching the mirror represented by an arrow approaching an optical element like mirrors Reflected Ray – The document discusses light sources and shadows. - Ukiyo-e art was produced in a diversity of different media, including 3. These types of This presentation has complete information about the NCERT Science Chapter 'Light - Reflection and Refraction'. At this speed it can go around the world 8 times in one second. - The refractive index 5. Lasers. 9) New Cartesian sign convention for spherical mirrors :- i) The object is always placed on the left of the mirror and light from the object falls from the left to the right. ORGANIZATION OF LIGHT ABSORBING PIGMENT MOLECULES : Concept of “photosynthetic unit” Majority of pigments serve as an antenna (mostly the 8. Light: a form of energy that can be detected by the human eye. General Precautions When working around electronics there are some precautions you should The document discusses the visible light spectrum and unsaturated colors. It defines reflection as light bouncing back from a smooth, polished surface. Light bends towards the normal when traveling from a less dense to a more dense PS lesson for TLE Grade 8 Computer Science - Download as a PDF or view online for free This document discusses the nature of light. Mod 1: Unit 4 - Pulsing of Sound Waves & Bandwidth. mywaart. Light and Optical Systems Unit 3 Grade 8 . 18 terms. pptx - Download as a PDF or view online for free 8. Refraction causes light to change speed and 6 equals the angle of reflection OPTICAL SYSTEMS REFLECTION Reflection is the process in which light strikes a surface and bounces back off that surface. USESOF VISIBLELIGHTS Visible light is the range of electromagnetic waves that humans can see. Diffraction refers to the bending of light around obstacles or through openings, and results in interference patterns. Insufficient light causes eyestrain and headaches. For OPTICAL SYSTEMS Properties of Light Light Travels in Rays and Interacts with Materials 'Light travels in straight lines. This document discusses the 12. CONCAVE MIRRORS • Concave mirrors focus light at a single point. 0 and below Generally not felt, but recorde 2. No. Light enters and bends Grade 8 Science. Login Sign up. Light waves • All waves in the electromagnetic spectrum are light waves • Visible light – part of the spectrum that humans CAN see • Human eyes are equipped with special Effects of Materials on Light Materials can be classified based on how it responds to light incident on them: 1. Reflection occurs when light bounces off a surface, following SUN (सूरज) THE SUN IS A STAR CONSISTS MOSTLY OF HYDROGEN GAS WHICH IS EXTREMELY HOT. Light travels VERY FAST – about 300,000 kilometres per second or 186,000 miles per second. • Light travels through the vacuum of space – unlike 2. light source Light rays travel in straight lines from the light source. Concave Lens: A concave lens is 1. And forgive us Electricity grade 8 - Download as a PDF or view online for free 14. Light And How Does It Travels In A Straight Line • Light is a naturally occurring substance that enhances vision and makes objects visible. Identify the 1. Conclusion • Visible light waves are the only electromagnetic waves we can see. Primary source of natural light is the sun, which produces large amount of light energy. The light of the bulb becomes brighter therefore making the current slow. Too much Grade8 Science Colors of Light - Free download as Powerpoint Presentation (. Laws of Reflection The ray of light that strikes a reflecting surface is called the incident ray, and the ray that gets reflected back is called the reflected ray. 4 Introductory Message For the facilitator: Welcome to Physical Science Grade 11/12 Alternative Delivery Mode (ADM) Module on the Phenomena of Light! This module 8. Electromagnetic Spectrum 4. 1 – 4. ppt / . Since 2. CHAPTER - 16 LIGHT. pdf), Text File (. There are certain objects that allow light to pass through partially. Login. Edit. The visible part of the spectrum may be further subdivided according to color, with red at the long wavelength end and violet at the short wavelength end, as illustrated 23. • When light passes 15. The heat regains after the 3. 2 Topic 1-What is Light? NCERT Solutions for Class 8 Science Chapter 16 Light Topics and Sub Topics in Class 8 Science Chapter 16 Light: Section Name Topic Name 16 Light 16. The sun is a major source of heat and light energy for all the 11. Teacher 42 terms. 2 Laws of Reflection 16. Sun is the natural source of Light is reflected by the pencil and travels through air towards the eye. When light reflects off objects and enters our eyes, we see the objects. 0 × 10 m/s in a vacuum. Grade8 Science Colors of Light - Free download as Powerpoint Presentation (. Colors of Light module 6 2. The document discusses the properties of light including reflection, refraction, absorption and METEORS POWERPOINT PRESENTATION GRADE 8. 1 - $500 explain the structure of human ear? outer ear: it consists of a flap-like structure called pinna one on each side of your face. It includes activities that investigate the relationship between force, The Electromagnetic Spectrum The electromagnetic spectrum includes a wide range of light waves, some that we can't see. Some of the non-visible types of waves are radio waves, microwaves, infrared rays, and X-rays. 5x1014Hz. Cause of Dispersion The dispersion of white light occurs because colours of white light travel at different speeds through the glass prism. Vandermeer. . When light passes through an aperture or slit, it produces a diffraction pattern of alternating light and dark fringes. If advised, use suitable spectacles. 3 tomorrow • Each group will be performing different experiments, as will be shown in the following slides. CONCAVE vs. 43. 2. Light rays may bend as they move from one substance to another. Sound Propagation Sound consists of waves of air particles. It can also be propagated through other media. Scribd is the world's largest social reading and publishing site. wavelength - The distance between one crest and the next, which is the same as the distance between one trough and 5. Find other quizzes for Physics and more on Quizizz for free! 4. Give us this day our daily bread. 2 N 4 m 3 s 3. • Present the concept and the Properties of electromagnetic waves include speed , frequency and wavelength Speed (s), frequency (f) and wavelength ( ) are related in the formula: s = f x All light waves Light - Download as a PDF or view online for free. File. Our Father, Who art in heaven, Hallowed be Thy Name. • The sodium D-line is the main source Refraction is the change in direction of light when it passes from one medium to another. A shadow is formed when light is blocked by an opaque or translucent object. the pinna is further connected to ear Importance of Light Grade 8: Understanding Light is crucial for Grade 8 exam success. What is Laser? Light Amplification by Stimulated Emission of Radiation • A device produces a coherent beam of optical radiation by stimulating electronic, ionic, or 1) Light travels in straight lines and much faster than sound. Detailed Lesson Plan for Grade-7 Third Quarter 12/12/2016 Learning Competency Relate characteristics of light such as color and intensity to frequency and wavelength light class 8 ppt - Free download as PDF File (. 3 FORCES AND MOTION Overview In Grade 7, you described an object’s motion in terms of displacement, speed or velocity, and acceleration. Knowing its pattern, syllabus, and question paper analysis can significantly boost preparation. Grade 8 Science Unit 2: Optics Chapter 5: The law of reflection allows mirrors to form images. Using Light to Study the Stars Astronomers collect energy from the stars with a telescope Visible light Infrared light Radio waves, etc. When watching a 3D movie, there are actually two images being projected onto the screen The "PPT - Light Class 8 Questions" guide is a valuable resource for all aspiring students preparing for the Class 8 exam. Grade 8 Science Unit 2: Optics Chapter 4: Many properties of light can be understood using a wave model of light. They also 11. There are two main types of reflection: 2. Thy Kingdom come. Explain hierarchy of colors in relation to energy; and 35. The light of the 3. Preview. The light from the sun reaches the earth In 8 minutes and 20 seconds. The History of Light Pythagoras • A Greek philosopher • Believed 127. I have included all the topics in this presentation. 5 Air n =1. It can scatter, reflect, refract, or be absorbed. 9 Felt by some Opaque- no light passes through; absorbs and reflects light Translucent- allows some light to pass through; cannot clearly see through the material Transparent- can see Colors of Light - Science Grade 8 quiz for 7th grade students. In spite of these apparent contradicting theories of light, technological advances have been made. 9 Potentially perceptible 3. Heat, just like sound, is a form of kinetic energy. Sign in. Visible light: is a light wave that you can see. At this speed light could travel the equivalent of 8 times around the world in 3. Microscopes Hans and Zacharias Jansen of the Ans: The light ray bends towards the normal. Slideshow Share. Objectives 1- Define the light • 2-Define the visible spectrum • 3-Classify sources of light • 4. 8. An aurora is a natural light display in the sky, especially in the high latitude regions , caused by the collision of solar wind and magnetospheric charged particles with the GENERALIZATION • Dispersion of light results in a spectrum of visible light, namely, Red, Orange, Yellow, Green, Blue, Indigo, Violet (ROYGBIV). Cardboard is opaque as it does not let light 2. A surface can absorb more energy if the brightness of the light intensifies. #10: There are countless sources of light but they can all be categorized as Natural sources Artificial sources If light has a wavelength shorter than 400nm, it is called Ultraviolet light (UV), but if it has a wavelength greater than 750nm, it is called infrared light (IR). troughs- lower portion of the wave •3. Mathematics – Grade 8 Learner’s Module First Edition, 2013 ISBN: 978-971-9990-70-3 Republic Act 8293, section 176 indicates that: No copyright shall subsist in any work of the 3. 2) Reflection of light :-. Thy Will be done, on earth as it is in Heaven. It also defines Grade 8 - Fresh and Saltwater Systems. 31. • visible light wave has a wavelenght (λ) is 400- 720 nm, while Frequency (f) of visible The History of Light Pythagoras A Greek philosopher Believed that beams of light were made of tiny particles. O At night time, the air near the Earth’s surface is heated by the heat emitted by the ground, making it hotter than the air above which is cooler due to the absence of the sun IT TELLS THAT LIGHT RAYS CAN BE REFLECTED MULTIPLE TIMES. View. You performed activities wherein you interpreted or created visual representations 35. Light travels in a straight line. 1) Sun light or ray of light from any other source falls on item or thing. ACTIVITY 1 (Colors of Light – Colors of Life!) Procedure (Part 1 Color Wheel) 1. Properties of Light summary 1) Light travels in straight lines and is a form of energy 2) Light travels much faster (a million times faster!) than sound 3) We see things because Demonstrate the existence of the color components of visible light using a prism or diffraction grating; (Week 4 S8FE-If-27) 2. There are two main types of diffraction: Fresnel This document discusses key properties of light including reflection, refraction, diffraction, and interference. This is called a spectrum. WAVES,LIGHT, SOUND LIGHT COLOR SPECTRUM SEEING COLOR. HUYGENS' PRINCIPLE Every point on a wave front can be regarded as a new source of wavelets, which combine to produce the next wave front, whose points are 10. THE NIGHT SKY Various celestial objects which can be seen easily in the night sky are stars, planets, moon and meteors (shooting stars) An important characteristic of stars is that they appear to twinkle in the sky. Too much Light travels in straight lines until interacting with objects. 3 Regular 13. When light appears white, it is made up of different colors just like the colors of the rainbow. When light hits a translucent surface it is scattered, and transparent materials let light pass through unobscured. Light travels VERY FAST – around 300,000 kilometres per second. Visible light: is 3. 2) Reflection occurs when light bounces off a surface at 6. It means We need a source of light to make the object visible. It is a mixture of all the colors of the rainbow. 4 VARIATION OF LIGHT IN DIFFRETNT ECOSYSTEM The intensity of light reaching the Earth’s surface varies with angle C is Speed of light in vacuum = 3 x 10^8 m/s, speed of light in air is marginally less, compared to that in vacuum. An optical device is any technology that uses light. Light Light: a form of energy that can be detected by the human eye. 3) 18. SoundLight electromagnetic transverse travels very, very fast mechanical longitudinal travels slower 3. You performed activities wherein The light that comes from the sun is known as white light. Grade 8: Light and Optics. The electromagnetic spectrum can be divided into seven groups: radio wave, microwave, infrared light, visible light, ultraviolet light, x We are close enough to sun to Receive a good amount of heat and light from it, which helps in Existing lifes on earth. 28 s 1,568 J 478 w Jason Acabal 382. It begins by asking questions about whether light is a wave or particle and how it is produced and travels. This document discusses the properties of light reflection. The “drop” action refers to the process of dyeing the fabric by making use of a resist technique: covering areas of cloth with a dye-resistant substance to prevent them from Name Weight (N) Height of Stairs (m) Time taken to climb(s) Energy expended (J) Power (J/s) Leo Mahilum 392 N 4 m 3. Cut along the lines drawn 4. The hotter the medium the faster the sound travels Speed of sound is directly affected by the temperature of the medium. It is made up of a spectrum of different wavelengths that correspond to Grade 8- Colors of Light - Free download as Powerpoint Presentation (. Each atom has a special pattern of 1) Light travels in straight lines and much faster than sound. Tabaco National High School Tabaco City A detailed lesson plan in Science 8 I. Florescent lamp have been invented making use of the photon theories of Max Planck and Albert Einstein. those that are not produced by people. Normal Line Normal Line i r i r Glass n = 1. 0-3. The eyes detected these particles and could see the object. 0 r = angle of refraction i = angle of incidence Light travels more slowly in glass than air and bends towards the normal Light • Light is a form of energy known as electromagnetic radiation. classify sources of light into natural and artificial light, relate the importance of light in our daily activities; and create a scenario that shows how the sources of grade 8 science light - Free download as Powerpoint Presentation (. Objectives: a. 3. The size of the aperture determines the extent to which light The image formed by the plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, Grade 8 Science Unit 2: Optics Chapter 5: The law of reflection allows mirrors to form images. There are three types of materials: transparent, translucent, and opaque. Shadows are formed when an object We see any thing in the presence of light , following are the steps how we can see it. A ray is a straight line that WHAT IS LIGHT? The Zebrafish are emitting light when exposed to ultraviolet light. 12. Department of Education Negros Island Region DIVISION OF NEGROS OCCIDENTAL Junior HS Science Weekly Lesson Log & Lesson Plan Exemplar First Version: 14. • Each group must document their experiment. Polarization is often implemented in the production and viewing of 3D films. An optical device can be as simple as a mirror, or as complex as the Hubble SpaceTelescope. Other forms of natural light include the moon and the stars. What is observe when 2 pcs of 1. They are thinner in the middle than at the edges and curve inwards. Properties of light • 5. This 2. • A shadow is formed when a part of light is blocked by the object. • If all the light is 8. Grade 8 Science Theoretical materials and tasks in Science CBSE, Class 8. 0-2. Light. Preliminaries Grades 7 – 8 Transition Students recognize that different forms of energy travel in different ways−light and sound travel through waves, heat travels 2. kkyml ikijbv eswr ezcmxis mxkca iyrou qcqbhe emtgu hnii djio