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Question
Light of a single colour is passed through a liquid having a piece of glass suspended in it. On changing the temperature of liquid, at a particular temperature the glass piece is not seen. When is the glass piece not seen?
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Solution
The glass piece is not seen when the refractive index of liquid becomes equal to the refractive index of glass.
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RELATED QUESTIONS
In the adjacent diagram, AO is a ray of light incident on a rectangular glass slab.

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After tracing the path of rays of light through a glass slab for three different angles of incidence, a student measured the corresponding values angle of refraction r and angle of emergence e and recorded them in the table given below:
|
S. No. |
∠i |
∠i |
∠e |
|
I |
30° |
20° |
31° |
|
II |
40° |
25° |
40° |
|
III |
50° |
31° |
49° |
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(B) II and III
(C) I and III
(D) I, II and III
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(C) III
(D) IV
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