A ray of light passes through the centre of curvature of a concave mirror and strikes the mirror. At what angle is the ray reflected?

The value of T in the figure above is

When blue and green colours of light are mixed, the resultant colour is

According to kinetic molecular model, in gases

Lamps in domestic lightings are usually in

A metal rod has a length of 100cm at \(200^\circ C\). At what temperature will its length be 99.4cm. If the linear expansivity of the material of the rod is ...

A train has an initial velocity of 44m/s and an acceleration of -4m/s\(^{2}\). Calculate its velocity after 10 seconds

If a body moves with a constant speed and at the same time undergoes an acceleration, its motion is said to be

The limiting frictional force between two surface depends on I. the normal reaction between the surfaces II. the area of surface in contact III. the relative...