H C Verma Solutions for Chapter: Light Waves, Exercise 3: OBJECTIVE II

When light propagates in vacuum, there is an electric field and a magnetic field. These fields
 

Huygens' principle of secondary wavelets may be used to

Three observers $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ measure the speed of light coming from a source to be $v_{\mathrm{A}},v_{\mathrm{B}}$ and $v_{\mathrm{C}}$, respectively. The observer $\mathrm{A}$ moves towards the source and $\mathrm{C}$ moves away from the source at the same speed. The observer $\mathrm{B}$ stays stationary. The surrounding space is vacuum everywhere.

Three observers $\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$ measure the speed of light coming from a source to be $v_{\mathrm{A}}, v_{\mathrm{B}}$ and $v_{\mathrm{C}}$. The observer $\mathrm{A}$ moves towards the source and $\mathrm{C}$ moves away from the source at the same speed. The observer $\mathrm{B}$ stays stationary. Suppose the surrounding medium is water everywhere. Select the correct option(s) from the list given in that question.

Light waves travel in vacuum along the $x$-axis. Which of the following may represent the wavefront?

If the source of light used in a Young's double slit experiment is changed from red to violet,

A Young's double slit experiment is performed with white light.
 

Four light waves are represented by:-
$\left(i\right)$ $y=a_1\sin \omega t$
$\left(ii\right)$ $y=a_2\sin (\omega t+\epsilon )$
$\left(iii\right)$ $y=a_1\sin 2\omega t$
$\left(iv\right)$ $y=a_2\sin 2(\omega t+\epsilon )$
Interference fringes may be observed due to superposition of