What is the refractive index of glass material for which the speed of light in it is 1.92×108 m/s?

If you stand 2 m in front of a plane mirror, how far away from you is your image?

An object formed by a plane mirror can be described as follows EXCEPT

What image is formed when an object is placed between the focal point and the centre of curvature of a concave mirror?

What is the difference between a real and a virtual image?

How long is the image of a metre stick formed by a plane mirror?

What is the image distance of an object placed 20 cm from a converging lens of focal length 15 cm?,

Two plane mirrors M1 and M2 are parallel to each other with M2 on the right of M1. The mirrors are 30 cm apart. A pin is placed between the mirrors 7.5 cm from M2. Calculate the distance of the second image from each mirror.

A ray of light makes an angle of 30º with the normal to a plane mirror. The mirror is turned through an angle of 10º, making the incidence angle 40º. Through what angle is the reflected ray turned?

In order for you to just be able to see the top of your head with a plane mirror, the top of mirror must be ___________