G11 T2 Quiz 1 Reflection And Refraction

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  • 1/10 Questions

    What causes refraction when light travels from air into glass?

    • The amplitude of the light waves changes.
    • The colour of the light changes.
    • The frequency of the light waves changes.
    • The speed of the light changes.
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About This Quiz

This G11 T2 Quiz 1 focuses on Reflection and Refraction, assessing understanding of light behavior in mirrors and through different mediums. It covers key concepts like the laws of reflection, refraction, and critical angles, crucial for students mastering physics.

G11 T2 Quiz 1 Reflection And Refraction - Quiz

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  • 2. 

    The speed of light in air is almost 3x108 m/s. In one piece of glass, light slows down to 2x108 m/s. What is the index of refraction for the glass?

    • 6

    • 0.67

    • 1.5

    • 5

    Correct Answer
    A. 1.5
    Explanation
    The index of refraction for a medium is defined as the ratio of the speed of light in a vacuum to the speed of light in that medium. In this case, the speed of light in air is almost 3x10^8 m/s, and in the glass, it slows down to 2x10^8 m/s. By dividing the speed of light in a vacuum by the speed of light in the glass, we get an index of refraction of 1.5.

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  • 3. 
    The diagram shows a ray of light entering a block of glass.Which numbered angles are the angles of incidence and of refraction? - ProProfs

    The diagram shows a ray of light entering a block of glass.Which numbered angles are the angles of incidence and of refraction?

    • Incidence:1; refraction: 3

    • Incidence:1; refraction: 4

    • Incidence:2; refraction: 3

    • Incidence:2; refraction: 4

    Correct Answer
    A. Incidence:2; refraction: 4
    Explanation
    The diagram shows a ray of light entering a block of glass. The angle of incidence is the angle at which the ray of light enters the glass, and it is labeled as angle 2 in the diagram. The angle of refraction is the angle at which the ray of light bends as it passes through the glass, and it is labeled as angle 4 in the diagram. Therefore, the correct answer is "Incidence:2; refraction: 4".

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  • 4. 
    A girl looks into a bathroom mirror to brush her hair. The figure shows what she sees in the mirror.In which hand is she holding the brush?  - ProProfs

    A girl looks into a bathroom mirror to brush her hair. The figure shows what she sees in the mirror.In which hand is she holding the brush? 

    • Right hand

    • Left hand

    Correct Answer
    A. Right hand
    Explanation
    Based on the figure shown in the mirror, the girl appears to be holding the brush with her right hand.

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  • 5. 
    A man sees a stone at the bottom of a pool of water.Which path could be taken by light from the stone to the man? - ProProfs

    A man sees a stone at the bottom of a pool of water.Which path could be taken by light from the stone to the man?

    • A

    • B

    • C

    • D

    Correct Answer
    A. B
    Explanation
    Light travels in straight lines, so the only possible path for light from the stone at the bottom of the pool to the man would be path B.

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  • 6. 

    A ray of light passes from air into a block of glass with index of refraction of 1.5. The angle of incidence is 30 degrees.Calculate the angle of refraction,

    • 30

    • 19.5

    • 0.05

    • 1

    Correct Answer
    A. 19.5
    Explanation
    The angle of refraction can be calculated using Snell's Law, which states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the indices of refraction of the two media. In this case, the angle of incidence is 30 degrees and the index of refraction of glass is 1.5. By applying Snell's Law, we can find that the angle of refraction is 19.5 degrees.

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  • 7. 
    Which diagram correctly shows a ray of light passing through a rectangular glass block? - ProProfs

    Which diagram correctly shows a ray of light passing through a rectangular glass block?

    • A

    • B

    • C

    • D

    Correct Answer
    A. A
    Explanation
    Diagram A correctly shows a ray of light passing through a rectangular glass block because the ray enters the block at an angle, bends towards the normal, and then exits the block parallel to its original direction. This is consistent with the principles of refraction, where light bends when it travels from one medium to another with a different refractive index. Diagrams B, C, and D do not accurately depict the bending of light when passing through a rectangular glass block.

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  • 8. 
    Light from the Sun passes through a prism and a spectrum is produced on a screen.A thermometer placed at P shows a large temperature rise.Which type of radiation causes this? - ProProfs

    Light from the Sun passes through a prism and a spectrum is produced on a screen.A thermometer placed at P shows a large temperature rise.Which type of radiation causes this?

    • Infra-red

    • Microwave

    • Ultra-violet

    • Visible light

    Correct Answer
    A. Infra-red
    Explanation
    When light from the Sun passes through a prism, it gets separated into its different wavelengths, forming a spectrum on a screen. The fact that a thermometer placed at P shows a large temperature rise suggests that the type of radiation causing this is infra-red. Infra-red radiation has longer wavelengths and carries more heat energy compared to visible light, ultraviolet, or microwave radiation. Therefore, it is able to cause a significant temperature rise when absorbed by the thermometer.

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  • 9. 
    The diagram shows a ray of light incident on the edge of a piece of glass. The angle i is biggerthan the critical angle.Which arrow correctly shows the direction of the ray after it leaves the edge of the glass?  - ProProfs

    The diagram shows a ray of light incident on the edge of a piece of glass. The angle i is biggerthan the critical angle.Which arrow correctly shows the direction of the ray after it leaves the edge of the glass? 

    • A

    • B

    • C

    • D

    Correct Answer
    A. D
    Explanation
    When the angle of incidence is greater than the critical angle, total internal reflection occurs. This means that the light ray is reflected back into the glass instead of being refracted out of it. Therefore, the correct arrow to show the direction of the ray after it leaves the edge of the glass is D, which indicates that the ray is reflected back into the glass.

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  • 10. 
    In an optics lesson, a Physics student traces the paths of three rays of light near the boundarybetween medium A and air. The student uses a protractor to measure the various angles.State the critical angle of medium A - ProProfs

    In an optics lesson, a Physics student traces the paths of three rays of light near the boundarybetween medium A and air. The student uses a protractor to measure the various angles.State the critical angle of medium A

    • 53

    • 90

    • 133

    • 43

    Correct Answer
    A. 43
    Explanation
    The critical angle of a medium is the angle of incidence at which the refracted ray is at 90 degrees from the normal. In this case, the correct answer is 43 because it is the only option that is less than 90 degrees.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 15, 2015
    Quiz Created by
    Frank2F
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