PHYSICS MAM JKC

  7. Wave motion        Introduction  The wave motion has double periodicity. i.e. It is periodic in space & periodic in time.   Wave can be defined as an oscillatory disturbance traveling through a medium without change of form.    There are two types of wave (1) Transverse wave   A wave in which particles of a medium vibrate in a direction perpendicular to the direction of propagation of the wave is called as Transverse wave.  (2) Longitudinal wave A wave in which particles of medium vibrate in a direction parallel to the direction of propagation of the wave is called as longitudinal waves. For the propagation of wave through the medium, it must possess the following condition.  (1)The medium should be elastic i.e. It can regain its original shape & size as soon as the wave passes through it. (2)The medium should possess the inertia, so that it can store the energy & transfer in the form of waves. (3)...

    Wave theory of Light                  Introduction                     Light is the form of energy which makes object visible to our eyes. Light has dual nature particle as well wave nature . There were two theories proposed to discuss nature of light.     (1) Newton’s corpuscular theory of light, based on the particle nature of light    (i) Every source of light emits large number of tiny particles known as 'corpuscles' in a medium surrounding the source.  (ii) These corpuscles are perfectly elastic, rigid and weightless.  (iii) The corpuscles travel in a straight line with very high speeds, which are different in different media.  (iv)  One gets a sensation of light when the corpuscles fall on the retina.  (v) Different colours of light were due...