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प्रश्न
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उत्तर
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संबंधित प्रश्न
In the given figure PQ and PR are the two light rays emerging from an object P. The ray PQ is refracted as QS.
- State the special name given to the angle of incidence ∠PQN of the ray PQ.
- What is the angle of refraction for the refracted ray QS?
- Name the phenomenon that occurs if the angle of incidence ∠PQN is increased.
- The ray PR suffers partial reflection and refraction on the water-air surface. Give reason.
- Draw in the diagram the refracted ray for the incident ray PR and hence show the position of image of the object P by the letter P’ when seen vertically from above.
Make the correct choices for each of the following :
Total Internal reflection takes place when
(where ∠i = angle of incidence, ∠r = angle of refraction, ∠C = critical angle)
What is meant by the statement, ‘the critical angle for diamond is 24°’?
Choose the correct option.
Angles of deviation for extreme colours are given for different prisms. Select the one having maximum dispersive power of its material.
Answer the following question.
Under what conditions are total internal reflection possible? Explain it with a suitable example.
For total internal reflection to take place, the angle of inddence i and the refractive index µ of the medium must satisfy the inequality ____________.
For a ray of light, the critical angle is minimum when it travels from ______.
The twinkling effect of star light is due to ______.
A particle is projected such that the horizontal range and vertical height are equal. Then the angle of projection is :
The critical angle is the angle of incidence in the denser medium for which the angle of refraction in the rarer medium is:
