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प्रश्न
A pond appears to be 2.7 m deep. If the refractive index of water is `4/3`, find the actual depth of the pond.
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उत्तर
Given: apparent depth \[=2.7\ \text{m}\]
refractive index \[=\frac{4}{3}\]
\[\mu=\frac{\text{real depth}}{\text{apparent depth}}\]
\[\text{Real depth}=\frac{4}{3}\times2.7\]
= 3.6 m
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संबंधित प्रश्न
Explain how the formation of a rainbow occurs.
A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence (∠i). He then measures the corresponding values of the angle of refraction (∠r) and the angle of emergence (∠e) for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be
(A) ∠i > ∠r > ∠e
(B) ∠i = ∠e > ∠r
(C) ∠i < ∠r < ∠e
(D) ∠i = ∠e < ∠r
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° |
The correct observations are:
(A) I and II
(B) II and III
(C) I and III
(D) I, II and III
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(A) I
(B) II
(C) III
(D) IV
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What should be the ratio of the speed of light through the liquid to the speed through the glass so that there is no refraction of light at the boundaries of the glass block when the system is illuminated by the light of one colour?
Trace a ray of light incident at 30° on a surface if travelling from glass to air. What is the angle of refraction in this case? (R.I. for glass = 3/2).
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