Practice test

Light and optical instruments - Test Set 3

Review 20 exam-focused questions with detailed explanations, then start the interactive test when you are ready.

20 questions

Questions and explanations

  1. Question 1

    Which of the following types of mirrors show a lateral inversion of light?
    1. Convex mirror
    2. Concave mirror
    3. Rectangle mirror
    4. Plane mirror
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  2. Question 2

    The color of the clear sky is blue due to the phenomenon of:
    1. Dispersion of light
    2. Reflection of light
    3. Scattering of light
    4. Refraction of light
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  3. Question 3

    What is the full form of LED?
    1. Linear Emergency Device
    2. Light Emitting Diode
    3. Liquid Emitting Display
    4. Light Emitting Device
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  4. Question 4

    Which phenomenon deals with the scattering of light by molecules of a medium when they are excited to vibrational energy levels?
    1. Huygens Effect
    2. Maxwell Effect
    3. Raman Effect
    4. Rayleigh Effect
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  5. Question 5

    The phenomenon of deviation of light rays from their original path, when they pass from one medium to another, is called ______.
    1. refraction
    2. diffraction
    3. reflection
    4. obstruction
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  6. Question 6

    Sun appears red in colour during sunrise and sunset due to
    1. The fact that sun emits only red colour at that time
    2. The fact that all other colours scatter away except red
    3. Red light having longer wavelength scatters away
    4. The sun comes out of the mountains
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  7. Question 7

    The colour of the ocean appears to be blue because the sunlight falling on it is
    1. Diffracted
    2. Reflected
    3. Scattered
    4. Refracted
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  8. Question 8

    In the absence of the earth’s atmosphere sky would appear
    1. Deep Red
    2. Blue
    3. White
    4. Black
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  9. Question 9

    Which is the phenomenon which established the transverse nature of light?
    1. Polarization
    2. Diffraction
    3. Refraction
    4. Reflection
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  10. Question 10

    Rainbows are formed when sunlight
    1. Incident on raindrops hanging in the atmosphere is dispersed after suffering reflection
    2. Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
    3. Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
    4. None of the given statement is correct
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  11. Question 11

    Which of the following colour of light deviates least through the prism?
    1. Yellow
    2. Green
    3. Red
    4. Violet
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  12. Question 12

    Rainbow is formed due to
    1. Scattering and Refraction
    2. Refraction and Dispersion
    3. Diffraction and Refraction
    4. Reflection and Refraction
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  13. Question 13

    Which of these waves can be polarized
    1. Light waves
    2. Transverse waves on a string
    3. Longitudinal waves on a string
    4. Sound waves in air
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  14. Question 14

    The sky appears blue due to
    1. Mie scattering
    2. Rayleigh scattering
    3. Back scattering
    4. None of the above
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  15. Question 15

    The splitting of white light into its component is due to
    1. Transmission
    2. Reflection
    3. Dispersion
    4. Refraction
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  16. Question 16

    Light scattering takes place in
    1. Basic solutions
    2. Electrolyte solutions
    3. Acidic solutions
    4. Colloidal solutions
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  17. Question 17

    Which of the following statements is true when we see 'rainbow'?
    1. The sun remains behind as and we face raindrops
    2. In light rainfall, we face sun
    3. We face sun and raindrops
    4. The sky remains clear and the sun is at lower position in the sky
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  18. Question 18

    A soap bubble shows colours when illuminated with white light. The is due to
    1. Diffraction
    2. Interference
    3. Reflection
    4. Polarisation
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  19. Question 19

    The formation of Rainbow takes place, when sunlight-
    1. Scattered due to the reflection from water drops in atmosphere
    2. Scattered due to refraction from water drops in atmosphere
    3. Scattered due to refraction and total internal reflection from water drops
    4. None of the above
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  20. Question 20

    The Rainbow has: (Chose Incorrect Statement)
    1. Violet light as its innermost colour towards earth
    2. Its curvature bends towards earth
    3. Red light as its outermost colour toward sky
    4. Red light as its innermost colour towards earth
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