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प्रश्न
What is meant by the statement, ‘the critical angle for diamond is 24°’?
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उत्तर
It means that when a light ray is incident inside a diamond at an angle greater than 24°, the light will be totally internally reflected.
Or R.I of diamond is 2.14, `[because 1/(sin24^\circ) = 2.14]`
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संबंधित प्रश्न
Two isosceles right-angle glass prisms P and Q are placed near each other as shown in Fig. Complete the path of the light ray entering the prism P till it emerges out of the prism Q.
Write the relation between the refractive index and critical angle for a given pair of optical media?
(i) Define critical angle.
(ii) State one important factor which affects the critical angle of a given medium.
How are critical angles related to the refractive index of the medium?
Name the factors affecting the critical angle for the pair of media.
A ray of light passes through a right-angled prism as shown in the figure. State the angles of incidence at the faces AC and BC.
PQ and PR are two light rays emerging from the object as shown in the figure below:
(i) What is the special name given to the angle of incidence (∠PQN) of ray PQ?
(ii) Copy the ray diagram and complete it to show the position of the image of the object P when seen obliquely from above.
(iii) Name the phenomenon that occurs if the angle of incidence ∠PQN is increased still further.
Which of the following is not involved in formation of a rainbow?
For total internal reflection to take place, the angle of inddence i and the refractive index µ of the medium must satisfy the inequality ____________.
Total internal reflection can take place only if light is travelling from ______.
