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प्रश्न
State two conditions necessary for total internal reflection to occur.
Write the two conditions for total internal reflection of light.
State the conditions required for total internal reflection of light to take place.
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उत्तर
- The light must travel from a denser medium to a rarer medium.
- The angle of incidence must be greater than the critical angle for the pair of media.
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संबंधित प्रश्न
A ray of light travels from water to air as shown in the diagram given below :
1) Copy the diagram and complete the path of the way. Given the critical angle for water is 48°.
2) State the condition so that internal reflection occurs in the above diagram.
Name the factors affecting the critical angle for the pair of media.
State the relation between the critical angle and the absolute refractive index of a medium.
Name two factors which affect the critical angle for a given pair of media. State how do the factors affect it.
Solve the previous problem if the paperweight is inverted at its place so that the spherical surface touches the paper.
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].
In the following figure, show two rays A and B travelling from water to air. If the critical angle for water- air surface is 48°, complete the ray diagram showing the refracted rays for each. State conditions when the ray will suffer total internal reflection.
Choose the correct option.
Consider the following phenomena/ applications: P) Mirage, Q) rainbow, R) Optical fibre and S) glittering of a diamond. Total internal reflection is involved in
Choose the correct option.
Select the WRONG statement.
Explain ‘mirage’ as an illustration of refraction.
Answer the following question.
Why is prism binoculars preferred over traditional binoculars? Describe its working in brief.
Optical fibre communication uses the principle of ______.
Which of the following statements about total internal reflection is true?
The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur.
What are the conditions to achieve total internal reflection?
What are the examples of total internal reflection in nature?
A Rainbow is a beautiful natural phenomenon formed because of the following:
A given ray of light suffers minimum deviation in an equilateral prism P. Additional prism Q and R of identical shape and of the same material as P are now added as shown in the figure. The ray will now suffer ______.
The diagram below shows a fish in the tank and its image seen on the surface of the water.
Name the phenomenon responsible for the formation of this image.
