If the refractive indices of a medium for red and blue colours of light are μr and μb respectively, which one is greater in magnitude?

Is it possible to form a virtual image of shorter length than the length of the object by any mirror?

Dentists use (a) convex mirror (b) convex lens (c) concave mirror (d) concave lens

The wavelength of which of the following is greater than that of visible light? (a) x-ray (b) infrared ray (c) γ - ray (d) ultraviolet ray

If the radius of curvature of a concave mirror is 20 cm, then focal length of the mirror will be (a) 20 cm (b) 15 cm (c) 10 cm (d) 40 cm

What is meant by the principal axis of a concave lens?

What is long-sightedness? What type of lens is used to remedy this defect? [2+1]

Determine the angle of deviation for the refraction of light rays from rarer to denser medium. [2] (angle of incidence = i, angle of refraction = r) OR Why do the green leaves of trees appear 'green' in sunlight? [2]

Where is the image formed if the object is placed in between f and 2f of a convex lens ?

State whether the refractive index of a medium would increase or decrease if the angle of incidence is increased.

A ray parallel to the principal axis of a concave mirror follows which path after reflection by the concave mirror?

Write one use of a convex mirror