question_answer

In Youngs double slit experiment if two slightly different wavelengths are present  in the light used then :

A)  sharpness of fringes will increase everywhere (compared to the case when monochromatic light is used)

B)  there will be no fringes at all

C)  the sharpness of fringes will decrease as we move away from central fringe

D)  the central fringe will be white