a) Draw ray diagrams to show how the image is formed using a concave mirror, when the position of object is i) at C ii) between C and F iii) between F and P of the mirror.
b) Mention in the diagram the position and nature of image in each case.

State and verify laws of refraction using a glass slab.

The radius of curvature of a convex mirror is 40 cm. Find its focal length  

A concave mirror produces three times magnified real image of an object placed at 7 cm in front of it. Where is the image located?

The speed of light in water is 2.25 × 10⁸ ms^-1. If the speed of light in vacuum is 3 × 10⁸ ms^-1, calculate the refractive index of water.