1. Two independent monochromatic sources cannot act as coherent sources, why?
2. Does diffraction take place at the Youngâ€™s double slit?
3. Is there any difference between coloured light obtained from prism and colours of soap bubble?
4. A small disc is placed in the path of the light from distance source. Will the center of the shadow be bright or dark?
5. When a wave undergoes reflection at a denser medium, what happens to its phase?