Question

suppose white light falls on the two slits of a double slit experiment, but one slit is covered by a red filter (700 nm) and the other is covered by a blue filter (450 nm). what interference patter will appear on the screen?

Answer 1

The correct answer is that there is no interference observed. For interference to happen, the wavelength has to be equal from both slits, and the waves need to be in phase for there to be coherency. In this case, the wavelengths will be different so interference will not happen. Hope this helps