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Laws of reflection and refraction; angles from a ray diagram

This type of question, asked 3 times: 2024, 2025, 2026. All 7 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    2024

    24 (a)
    State two laws of refraction of light.

  2. Question 2

    2025

    11
    An optical device ‘X’ is placed obliquely in the path of a narrow parallel beam of light. If the emergent beam gets displaced laterally, the device ‘X’ is :

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  3. Question 3

    2025

    24
    Study the figure in which the path of a ray of light going from Medium 1 to Medium 2 is shown. (a) Out of the two Media – Medium 1 and Medium 2, in which is the speed of light more ? (b) State reason of bending of the refracted ray away from the normal. (c) Express refractive index of Medium 2 with respect to Medium 1 in terms of speed of light in two media.

  4. Question 4

    2026

    35
    (a) State the laws which help to find out the angle of incidence and angle of reflection in the ray diagram given above. (b) Find out the angle of incidence and angle of reflection in the given ray diagram.

  5. Question 5

    2026

    33
    With the help of above given ray diagram, calculate the angle of refraction. Given that the refractive index of Medium 2 with respect to Medium 1 is 3\sqrt{3}.

  6. Question 6

    2026

    33
    Use the above given ray diagram to calculate the angle of incidence. Given that the refractive index of Medium 2 with respect to the Medium 1 is 3\sqrt{3}.

  7. Question 7

    2026

    33
    With the help of the given ray diagram, calculate the refractive index of Medium 2 with respect to Medium 1. (Given that 3=1⋅732\sqrt{3} = 1{\cdot}732)