Embibe Experts Solutions for Chapter: Ray Optics, Exercise 1: MHT-CET Medical 2020

If a parallel beam of light is incident on convex as well as concave mirror then after reflection they pass through focal point. If $f$ is the focal length and $R$ is the radius of curvature of a mirror then for both the mirrors

A monochromatic beam of light passing through water (refractive index $=4 /3$ ) has wavelength  $5400 \mathrm{\AA }.$ When it is refracted in glass (refractive index $=3/2$) its wavelength will be