K K Sharma Solutions for Chapter: Wave Optics, Exercise 1: TOPICWISE QUESTIONS

Light of wavelength $6000 \stackrel{\circ }{\mathrm{A}}$ is incident on a slit of width $0.30 \mathrm{mm}$. The screen is placed $2 \mathrm{m}$ from the slit. The position of the first dark fringe and the width of the central bright fringe, respectively, are

A slit of width $a$ is illuminated by monochromatic light of wavelength $650 \mathrm{nm}$ at normal incidence. The values of $a$ when the first minimum falls at an angle of diffraction of $30°$ and the first maximum falls at an angle of diffraction of $30°$ are, respectively,

The red light of the wavelength $6500 \stackrel{\circ }{\mathrm{A}}$ from a distant source falls on a slit $0.50 \mathrm{mm}$ wide. What is the distance between the first two dark bands on each side of the central bright of the diffraction pattern observed on a screen placed $1.8 \mathrm{m}$ from the slit?

In a single slit diffraction experiment first minima for ${\text{λ}}_1=660 \mathrm{nm}$ coincides with the first maxima for wavelength ${\text{λ}}_2$. Calculate ${\text{λ}}_2$.

A polarizer is used to

At what angle of incidence will the light reflect from water $\left(\text{μ}=1.3\right)$ be completely polarised?

If a light beam is an incident at a polarizing angle $56.3°$ on the air-glass interface, then what is the angle of refraction in the glass?

A polariser and an analyzer are oriented so that maximum light is transmitted, what will be the intensity of outcoming light when the analyzer is rotated through $60°$?