Question

For the same angle of incidence in medium P. Q and R. the angle of
refraction is 15 25 35° respectively. In which medium will the velocity of
light be minimum?​

Answer 1

Answer:

We know that n = sin i/sin r

For the same angle of incidence i, the refractive index will be maximum for the medium for which 'r ’ is minimum i.e., for the medium R.

Further, we know that n = c/v

Thus, velocity of light is maximum in a medium for which n is minimum i.e., for the medium R. Velocity of light is minimum in the medium R.

PLZ MARK AS BRIANLIEST,FLW ME AND THX FOR THE SUPERB QUESTION

Answer 2

Answer:

Let the refractive index of the medium be n and speed of light in air is c.

Using Snell's law of refraction : n

air

×sini=n

medium

×sinr where n

air

=1

∴ 1×sini=n×sinr ⟹n=

sinr

sini

Velocity of light in a medium v=

n

c

=

sini

c×sinr

⟹v∝sin r

Thus velocity of light is minimum in medium A.