EXPLANATION OF NULL RESULT OF MICHELSON AND MORLEY EXPERIMENT BY STUDYING THE BEHAVIOUR Of WAVEFRONTS OF LIGHT

Michelson and Morley experiment was conducted in the year 1887 to measure the velocity of earth. In this experiment Michelson interferometer was used in which two rays of light are superimposed to generate interference fringes. The experiment is based on wave nature of light and interference pattern is observed in the telescope. The velocity of earth around the sun is 30 km/sec and a fringe shift of 0.44 fringe was expected on the rotation of interferometer at an angle of 90° at this velocity of earth of but no fringe shift was observed in this experiment. A number of explanations for null results were given, but no one was found to be correct. The null result of this experiment could not be explained by classical mechanics. The failure of Michelson and Morley experiment led to the development of special theory of relativity. As per S.T.R. light travels with Constant velocity in both the arms of interferometer irrespective of motion of light source or the observer and no time difference is involved between the two ray hence null result of MMX has been explained. In the present article it is demonstrated that null result of the MMX Can be explained by studying the behaviour of plane wavefront of light.