The least distance of distinct vision for a normal human eye is: (a) 25 cm (b) 100 cm (c) Infinity (d) 0 cm

When a ray of light is incident normally on the surface of a glass slab, the angle of refraction will be: (a) 0° (b) 90° (c) 180° (d) 30°

Which color of light undergoes the minimum scattering?

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

In the case of refraction of white light through a prism, the light of colour which deviates the least is yellow orange red violet

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?

Which type of mirror is used in the headlight of a motor car?

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