Question

(i) Define centripetal and centrifugal forces.
(ii) draw a ray diagram when a light ray containing blue, red and yellow colour is refracted through a glass block.

Answer 1

centripetal force is defined as the component of force acting on a body in curvilinear motion is directed towards the centre of curvature or axis of rotation ..
why centrifugal force is defined as the Apparent force equal and opposite to the centripetal force drawing a rotating body away from the centre

Answer 2

centripetal force -  a force that pulls an objectmoving in a circular path toward the center of its path

centrifugal force -
a force that acting in a direction away from a center.