Class 12 NEET Physics Optics Questions Part 1

The velocities of different colours is different in a given medium. Red and green are refracted at different angle of refraction.

sin‌i

sin‌rR

=µ ......(i)

sin‌i

sin‌rG

=µ ....(ii)

sin‌rp

sin‌ip

=µ ......(iii)
From equations (i), (ii) and (iii), we get
i=iR=iG
Thus two point propagation in two different parallel direction.