Embibe Experts Solutions for Chapter: Ray Optics and Optical Instruments, Exercise 1: Haryana Board-2019

The focal length of a lens of power $-4\mathrm{D}$ is :

Draw a ray diagram to sow image formation in a compound microscope. Define its magnifying power and write relation for it.

Rainbow is a phenomenon due to:

Draw a levelled ray diagram showing the image formation in an astronomical telescope. Define its magnifying power and write expression for it.

Optical fibres work on the phenomenon of :
 

Draw a labelled ray diagram showing the formation of image in a compound microscope.Define its magnifying power and write expression for it.