Draw a ray diagram to show the path of the reflected ray corresponding to an incident ray of light parallel to the principal axis of a convex mirror and show the angle of incidence and angle of reflection on it.

Redraw the ray diagram given below in your answer book and completer the path of ray.

The refractive index of water is 1.33 and the speed of light in air 3 × 10⁸ ms^–1. Calculate the speed of light in water.

How do we say a medium to be rarer or denser? Give two reasons.

When we focus sunlight using a convex lens at the tip of a matchstick, what will happen? Why?