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प्रश्न
If a ray of light passes from medium I to medium II without any change of direction, what can be said about the refractive indices of these media (angle I is not 0)?
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उत्तर
When a ray of light travels from medium I to medium II without any change of direction, it is possible under either of the following two conditions:
(i) A ray of light is incident normally on the surface separating two media.
(ii) The refractive index of the medium I is equal to the refractive index of medium II.
संबंधित प्रश्न
What is total internal reflection?
The observation made by Swarali while doing the experiment is given below. Based on these write answers to the questions:
Swarali found that the light ray travelling from the denser medium to rarer medium goes away from the normal. If the angle of incidence (i) is raised by Swarali, the angle of refraction (r) went on increasing. However, after certain value of the angle of incidence the light ray is seen to return back into the denser medium.
Questions:
- What is the specific value of∠i called?
- What is the process of reflection of incident rays into denser medium called?
- Draw the diagrams of three observations made by Swarali.
How are critical angles related to the refractive index of the medium?
Name the factors affecting the critical angle for the pair of media.
The adjacent diagram shows two right-angled isosceles prisms A and B. Complete the diagram to show the path of rays P and Q emerging out of the prism B. What principles have you used to complete the diagram?
A ray of light is incident as a normal ray on the surface of separation of two different mediums. What is the value of the angle of incidence in this case?
What are the examples of total internal reflection in nature?
Find the value of θ in the given figure.
