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प्रश्न
State the conditions required for total internal reflection of light to take place
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उत्तर
Conditions necessary for total internal reflection to take place are
1) Light must travel from a denser medium to a rarer medium.
2) The angle of incidence must be greater than the critical angle for the pair of media.
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संबंधित प्रश्न
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.
State two advantages of using a right-angle prism as a reflector, rather than a plane mirror.
A ray of light incident at an angle of incidence ‘i’ passes through an equilateral glass prism such that the refracted ray inside the prism is parallel to its base and emerges from the prism at an angle of emergence ‘e’.
How is the angle of emergence ‘e’ related to the angle of incidence ‘i’?
The diagram shows a point source P inside a water container. Three rays A, B, and C starting from P are shown up to the water surface. Show in the diagram the path of these rays after striking the water surface. The critical angle for the water-air pair is 48°.
Choose the correct option.
Select the WRONG statement.
Which of the following is not involved in formation of a rainbow?
Answer the following question.
Why is prism binoculars preferred over traditional binoculars? Describe its working in brief.
Observe the given figure and write appropriate phenomenon of light in the box.
The resultant `vec"R"` of `vec"P"` and `vec"Q"` is perpendicular to `vec"P"`. Also `|vec"P"|=|vec"R"|`. The angle between `vec"P"` and `vec"Q"` is ______.
[tan 45° = 1]
A ray of light passes from vacuum into a medium of refractive index µ, the angle of incidence is found to be twice the angle of refraction. Then the angle of incidence is ______.
