Explain the action of a prism, a convex lens and a concave mirror,when a plane wavefront is incident on it.

Explain the prismatic action of a covex lens.

Give one use of a concave and a convex mirror.

Briefly explain,how the focal length of a convex lens changes with increase in wavelength of incident light.

A convex lens becomes less converging when placed in

Explain the sketches the formation of a real enlarged image for a concave mirror

Draw a diagram to show the refraction of a plane wavefront incident on a convex lens and hence draw the refacted wavefront.