Physics Past Questions and Answers

Surface waves travelling in deep water at 15ms^-1 are incident at a shallow water boundary. If the angles of incidence and refraction are 45^o and 30^o respectively. Calculate the speed of the waves in shallow water

An incident ray is reflected normally by a plane mirror onto a screen where it forms a bright spot. The mirror and screen are parallel and 1m apart. If the mirror is rotated through 5^o, calculate the displacement of the spot

Convex spherical mirrors are preferred to plane mirrors as driving mirrors because

An object is placed 20cm from a lens. If an image is formed on a screen 260cm away from the lens, calculate the magnification of the image

A piece of cloth appears green in sunlight. When held in red light, it will appear