Question

A student puts a pencil into an empty trough and observes the pencil from the

position as indicated in the figure.

(a) What changes will be observed in the appearance

of pencil when water is poured into it

(b) Name and define the phenomenon which accounts

for the above stated observation.

(c) If the speed of light in vacuum is 3x108m/s, and

absolute refractive index of water is 1.33 calculate

the speed of light in water.​

Answer 1

Answer:

a. the pencil seems to be bend or broken.

b.This happens due to the refraction .it is defined as bending of light ray when it enters from one medium to another medium having varying optical density.

c.

n=c/v

v=c/n=2.25 ×10^8m/s

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