Physics Past Questions and Answers

An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this object produces an image 40cm from the mirror, the height of the image is

A boy looks at the image of an object in a plane mirror. He observes two images, a main bright one and the other faint. The observed images result from

What must be the distance between an object and a converging lens of focal length 20cm to produce an erect image two times the object height?

For a short sighted person, light rays from a point on a very distant object is focused

When light is incident on an object which is magenta in colour, which of the following colour would be absorbed?