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प्रश्न
For which colour of white light, is the refractive index of a transparent medium the most?
For which colour of white light the refractive index of a transparent medium the most? Give the reason for your answer.
उत्तर
The refractive index of a transparent medium is most for violet light.
The reason is that the speed of violet light is least in a transparent medium while the speed of red light is most in a transparent medium.
Notes
Students should refer to the answer according to their questions.
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संबंधित प्रश्न
Draw the diagram of refraction of light in the glass slab
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.
- Complete the path of the ray till it emerges out of the slab.
- 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?
- Mark angles of emergence by the letter e. How are the angles i and e related?
- Which two rays are parallel to each other? Name them.
- Indicate in the diagram the lateral displacement between the emergent ray and the incident ray. State one factor that affects the lateral displacement.
A coin is places at the bottom of a beaker containing water (refractive index = 4/3) to a depth of 12 cm. By what height the coin appears to be raised when seen from vertically above?
A ray of light enters a glass slab ABDC as shown in figure and strikes at the centre O of the circular part AC of the slab. The critical angle of glass is 42°. Complete the path of the ray till it emerges out from the slab. Mark the angles in the diagram wherever necessary.
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
Which of the following is the best experimental set-up out of the four shown for tracing the path of a ray of light passing through a rectangular glass slab ?
Observe the figure and write accurate conclusion regarding refraction of light.
Which colour of light travels fastest in any medium except air?
During sunset and sunrise, the sun is seen when it is slightly below the horizon. Give reason.
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?
