In Young's double slit experiment, slits are arranged in such a way that besides central bright fringes, there is only one bright fringe on either side of it. Slit separation d for the given condition cannot be (if `lamda` is wavelength of the light used):

Options

A. `lamda`
B. `lamda//2`
C. `2lamda`
D. `3lamda//2`

Answer

AB

Explanation

As path difference `dsintheta=nlamdaimpliesd=(nlamda)/(sitheta)`
As `sinthetalt1` so `dgtnlamda`, where n is an integer therefore `dnelamda` and `dne(lamda)/(2)`