Physics - Wave Optics Question with Solution | TestHub

In Young's double slit experiment, the two slits act as coherent sources of equal amplitude $a$ and of wavelength $\lambda$. In another experiment with the same set up, the two slits are sources of equal amplitude $a$ and wavelength $\lambda$, but are incoherent. The ratio of intensities of light at the mid point of the screen in the first case to that in the second case is