Advertisements
Advertisements
Question
A Water pond appears to be 2.7 m deep. If the refractive index of water is 4/3, find the actual depth of the pond.
Advertisements
Solution
Apparent depth = 2.7 m
`µw=4/3`
Real depth = apparent depth × 𝛍w
`=2.7xx4/3=3.6 m`
RELATED QUESTIONS
Write a short note on dispersion of light.
Explain how the formation of a rainbow occurs.
In fig 4.18, name the ray which represents the correct path of light while emerging out through a glass block.
What is meant by the statement the critical angle for diamond is 24°?
“A ray of light incident on a rectangular glass slab immersed in any medium emerges parallel to itself.” Draw labelled ray diagram to justify the statement.
Fig. shows a ray of white light that passes through a prism and produces a spectrum.
(a) Name the phenomenon that is taking place.
(b) What colour would you see at X and Y?
(c) What radiation would you detect above X and below Y?

Why upper surface of water contained in a beaker and above eye level appears silvery?
Which colour of light travels fastest in any medium except air?
How does the angle of deviation produced by a prism depend on the angle of incidence of light at the prism surface? Draw a graph to illustrate your answer.
The velocity of light in diamond is 121000 kms-1. What is its refractive index?
