मराठी

The Following Diagram Shows a 60°, 30°, 90° Glass Prism of Critical Angle 42°, Copy the Diagram and Complete the Path of Incident Ray Ab Emerging Out of the Prism Marking the Angle of Incidence on Each Surface.

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प्रश्न

The following diagram shows a 60°, 30°, 90° glass prism of critical angle 42°, Copy the diagram and complete the path of incident ray AB emerging out of the prism marking the angle of incidence on each surface.

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उत्तर

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2017-2018 (March) Set A

संबंधित प्रश्‍न

Write a short note on dispersion of light.


A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence (∠i). He then measures the corresponding values of the angle of refraction (∠r) and the angle of emergence (∠e) for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be

(A) ∠i > ∠r  > ∠e

(B) ∠i = ∠e  > ∠r

(C) ∠i < ∠r  < ∠e

(D) ∠i = ∠e  < ∠r


State the dependence of angle of deviation On the wavelength of light


In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.

  1. Complete the path of the ray till it emerges out of the slab.
  2. In the diagram, mark the angle of incidence (i) and the angle of refraction (r) at the first interface. How is the refractive index of glass related to the angles i and r?
  3. Mark angles of emergence by the letter e. How are the angles i and e related?
  4. Which two rays are parallel to each other? Name them.
  5. Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.

A ray of light of wavelength 6600 Å suffer refraction from air to glass. Taking \[\ce{_a\mu_g = \frac{3}{2}}\], find the wavelength of light in glass.


A ray of light is passing from a transparent medium 1 to another transparent medium 2 (i) Speed up (ii) slows down. In each case, state whether the refractive index of medium 2 is equal to, less than or greater than the refractive index of medium 1. 


Select from the following the best experimental set-up for tracing the path of a ray of light through a glass slab:
(A) I

(B) II

(C) III

(D) IV


For which colour of white light, is the refractive index of a transparent medium the least?

In what condition a prism is said to be in the position of minimum deviation? What is the direction of the refracted ray inside the prism in this condition?


Two parallel rays of Red and Violet travelling through the air, meet the air-glass boundary as shown in the above figure. Will their paths inside the glass be parallel? Give a reason for your answer.


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