Gr 8 Natural Sciences Ch 3.4: Refraction of light
64 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What happens to light as it passes from air to water and back to air when a straw is placed in a glass of water?

  • It changes color
  • It speeds up
  • It stops
  • It bends (correct)

    • What is the term for the splitting of white light into its component colors?

  • Refraction
  • Dispersion (correct)
  • Reflection
  • Diffraction

    • What is the purpose of a converging lens?

  • To bend light rays inward to a focal point (correct)
  • To spread light rays apart
  • To change the color of light
  • To block light

    • What type of lens is used to correct near-sightedness?

    <p>Diverging lens</p> Signup and view all the answers

    What is the term for the bending of light as it passes through a medium?

    <p>Refraction</p> Signup and view all the answers

    What is the purpose of a diverging lens?

    <p>To spread light rays apart</p> Signup and view all the answers

    What is the term for the process by which light is split into its component colors?

    <p>Dispersion</p> Signup and view all the answers

    What is the term for a lens that bends light rays inward to a focal point?

    <p>Converging lens</p> Signup and view all the answers

    What is the main reason for the bending of light as it passes from one medium to another?

    <p>The change in speed of light in different media</p> Signup and view all the answers

    What is the term for a measure of how much a medium can slow down light?

    <p>Optical density</p> Signup and view all the answers

    Why does a pencil in a glass of water appear bent?

    <p>Because of the refraction of light</p> Signup and view all the answers

    What happens to light as it enters a denser medium?

    <p>It slows down</p> Signup and view all the answers

    What is the term for the substance through which light travels?

    <p>Medium</p> Signup and view all the answers

    Why does a straw appear bent in water?

    <p>Because light changes direction as it moves from water to air</p> Signup and view all the answers

    What happens to light as it exits a denser medium into a less dense medium?

    <p>It bends away from the normal line</p> Signup and view all the answers

    Why do legs appear shorter when viewed from above in a pool?

    <p>Because of the refraction of light</p> Signup and view all the answers

    What happens to light when it passes through a prism?

    <p>It is split into its component colors</p> Signup and view all the answers

    What is the main difference between a converging lens and a diverging lens?

    <p>The direction in which they bend light rays</p> Signup and view all the answers

    What is the purpose of corrective lenses in glasses?

    <p>To correct vision by refracting light</p> Signup and view all the answers

    What is the cause of a rainbow?

    <p>The refraction and dispersion of light through a raindrop</p> Signup and view all the answers

    What is the purpose of lenses in optical devices such as microscopes and telescopes?

    <p>To magnify or focus light</p> Signup and view all the answers

    What is an example of a natural phenomenon that demonstrates refraction and dispersion?

    <p>A rainbow</p> Signup and view all the answers

    What is the term for the bending of light as it passes from one medium to another?

    <p>Refraction</p> Signup and view all the answers

    What is the purpose of a converging lens in a telescope?

    <p>To focus light rays inward to a focal point</p> Signup and view all the answers

    What is the main reason why light travels at different speeds in different media?

    <p>Because of the difference in the optical density of the media</p> Signup and view all the answers

    What happens to the light ray when it enters a denser medium at an angle?

    <p>It bends towards the normal line</p> Signup and view all the answers

    What is the reason why a straw appears bent in water?

    <p>Because light changes direction as it moves from water to air</p> Signup and view all the answers

    What happens to the light ray when it exits a denser medium into a less dense medium?

    <p>It bends away from the normal line</p> Signup and view all the answers

    What is the relationship between the density of a medium and its optical density?

    <p>A medium with higher density has higher optical density</p> Signup and view all the answers

    What is the result of the refraction of light when a pencil is placed in a glass of water?

    <p>The pencil appears bent</p> Signup and view all the answers

    What is the purpose of performing an experiment with a glass block?

    <p>To demonstrate the concept of refraction</p> Signup and view all the answers

    What is the reason why legs appear shorter when viewed from above in a pool?

    <p>Because light changes direction as it moves from water to air</p> Signup and view all the answers

    What is the primary reason for the observation of refraction in a straw placed in a glass of water?

    <p>Light travels at different speeds in air and water</p> Signup and view all the answers

    Which of the following is an example of dispersion?

    <p>A rainbow</p> Signup and view all the answers

    What is the main function of corrective lenses in glasses?

    <p>To correct vision by refracting light</p> Signup and view all the answers

    Why do different colors of light bend by different amounts when passing through a prism?

    <p>Because of their different wavelengths</p> Signup and view all the answers

    What is the purpose of a converging lens in an optical device such as a microscope?

    <p>To magnify objects</p> Signup and view all the answers

    What is the term for the process by which light is refracted as it passes from one medium to another?

    <p>Refraction</p> Signup and view all the answers

    Why does a converging lens focus light rays inward?

    <p>Because it has a convex shape</p> Signup and view all the answers

    What is the main reason why a diverging lens is used to correct near-sightedness?

    <p>Because it spreads light rays apart</p> Signup and view all the answers

    What is the primary reason why light travels at different speeds in different media?

    <p>Due to the variation in the density of the media</p> Signup and view all the answers

    What is the relationship between the optical density of a medium and its ability to slow down light?

    <p>The more optically dense the medium, the slower the light travels</p> Signup and view all the answers

    What is the result of the refraction of light when it passes from a denser medium to a less dense medium?

    <p>The light bends away from the normal line</p> Signup and view all the answers

    What is the purpose of performing an experiment with a glass block?

    <p>To demonstrate the process of refraction</p> Signup and view all the answers

    What is the reason why a pencil in a glass of water appears bent?

    <p>Because of the refraction of light as it passes from water to air</p> Signup and view all the answers

    What is the relationship between the density of a medium and its ability to bend light?

    <p>The more dense the medium, the more it bends light</p> Signup and view all the answers

    Why does a straw appear bent in water?

    <p>Because of the refraction of light as it passes from water to air</p> Signup and view all the answers

    What is the result of the refraction of light when it passes from a less dense medium to a denser medium?

    <p>The light bends towards the normal line</p> Signup and view all the answers

    What happens to white light as it passes through a prism?

    <p>It splits into its component colors</p> Signup and view all the answers

    What is the main purpose of a converging lens in optical devices?

    <p>To focus light rays inward</p> Signup and view all the answers

    What is the main reason for the formation of a rainbow?

    <p>Dispersion of light through a raindrop</p> Signup and view all the answers

    What is the main difference between a converging lens and a diverging lens?

    <p>Direction of bending</p> Signup and view all the answers

    What is the purpose of corrective lenses in glasses?

    <p>To correct vision by focusing or dispersing light</p> Signup and view all the answers

    What is the term for the bending of light as it passes from one medium to another?

    <p>Refraction</p> Signup and view all the answers

    What is the primary reason why different colors of light bend by different amounts when passing through a prism?

    <p>Due to their different wavelengths</p> Signup and view all the answers

    What is an example of a natural phenomenon that demonstrates refraction and dispersion?

    <p>Rainbow</p> Signup and view all the answers

    What happens to the speed of light as it travels from air to a denser medium?

    <p>It decreases.</p> Signup and view all the answers

    What is the primary reason for the bending of light as it passes from one medium to another?

    <p>The change in speed of light.</p> Signup and view all the answers

    What is the relationship between the density of a medium and its optical density?

    <p>They are directly proportional.</p> Signup and view all the answers

    What happens to the light ray when it exits a denser medium into a less dense medium?

    <p>It bends away from the normal line.</p> Signup and view all the answers

    What is the purpose of performing an experiment with a glass block?

    <p>To demonstrate the principles of refraction.</p> Signup and view all the answers

    What is the reason why legs appear shorter when viewed from above in a pool?

    <p>The refraction of light as it moves from water to air.</p> Signup and view all the answers

    What is the characteristic of a medium that determines how much it can slow down light?

    <p>Optical density.</p> Signup and view all the answers

    What is the result of the refraction of light when a pencil is placed in a glass of water?

    <p>The pencil appears bent.</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser