Embibe Experts Solutions for Chapter: Wave Optics, Exercise 1: BITSAT 2017

In Young's double-slit experiment, the distance between slits and screen is $2 \mathrm{m}$ and distance between slits is $0.25 \mathrm{mm}$. A light of wavelength $800 \mathrm{nm}$ is used to find fringes on the screen. If the screen moves with a speed of $5 \mathrm{m} {\mathrm{s}}^{-1}$, then first maxima will move with a speed of:

Two monochromatic light waves are travelling with same frequency and constant phase difference. If both waves interfere, then

In Young's double slit experiment, intensity at a point is $\left(\frac{1}{4}\right)$ of the maximum intensity. Angular position of this point is

In Young's double slit experiment, the slits are $2 \mathrm{mm}$ apart and are illuminated by photons of two wavelengths ${\lambda }_1=12000Å$ and ${\lambda }_2=10000Å$. At what minimum distance from the common central bright fringe on the screen $2 \mathrm{m}$ from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?

The ratio of intensity at the centre of a bright fringe to the intensity at a point distance one-fourth of the distance between two successive bright fringes will be