Physics
In the figure given below, the ray PQ emerging from the object P is refracted along QS. The angle PQN is known as:
- angle of deviation
- angle of refraction
- critical angle
- none of the above
Refraction Plane Surfaces
6 Likes
Answer
critical angle
Reason — Critical angle is the angle of incidence in the denser medium corresponding to which the angle of refraction in the rarer medium is 90°.
Answered By
3 Likes
Related Questions
An equilateral prism can be used to deviate a ray of light through:
- 30°
- 60°
- 75°
- 90°
Which of the following figures will depict deviation of ray of light A through 180°
The diagram below shows a light source P embedded in a rectangular glass block ABCD of critical angle 42°. The ray PQ would:
![The diagram below shows a light source P embedded in a rectangular glass block ABCD of critical angle 42°. Complete the path of the ray PQ till it emerges out of the block. [Write necessary angles.] ICSE 2019 Physics Solved Question Paper.](https://cdn1.knowledgeboat.com/img/abp10/5/icse-2019-physics-question-paper-solved-2e-1200x730.png)
- pass undeviated
- suffer refraction
- suffer reflection
- suffer total internal reflection
The phenomenon used to transmit a light signal over a wide range in optical fibre is:
- reflection
- refraction
- reflection and refraction
- total internal reflection