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

Light follows wave nature because

In interference, the ratio of maximum intensity to the minimum intensity is $25$. The intensities of the sources are in the ratio

For light waves are represented by 

(i) $y=a_1\sin \omega t$

(ii) $y=a_2\sin \left(\omega t+\varphi \right)$

(iii) $y=a_1\sin 2\omega t$

(iv) $y=a_2\sin 2\left(\omega t+\varphi \right)$

Interference fringes may be observed due to superimposition of

In Young's double-slit experiment, the slits are separated by $0.28 \mathrm{mm}$ and the screen is placed $1.4 \mathrm{m}$ away. The distance of the fourth bright fringe from the central bright fringe is found to be $1.2 \mathrm{cm}$. The wavelength of the light used is

In a Young's double slit experiment, the spacing between the two slits is $0.1\mathrm{mm}$. If the screen is kept at a distance of $1.0\mathrm{m}$ from the slit and the wavelength of light is $5000Å$, then the fringe wirdth will be

A telescope has an objective lens of $10 \mathrm{cm}$ diameter and is situated at a distance $1 \mathrm{km}$ from two objects. The minimum distance between these two objects which can be resolved by the telescope, when the mean wavelength of the light is $5000 \stackrel{\mathrm{o}}{\mathrm{A}}$, is of the order of