Electromagnetic Waves

A plane electromagnetic wave propagatingalong y-direction can have the following pairof electric field $(\vec{E})$and magnetic field $(\vec{B})$components?

A plane electromagnetic wave of frequency $20\mathrm{MHz}$ propagates in free space along $x$-direction. At a particular space and time $\vec{E}=6.6\hat{j}Vm^{-1}$. What is $\vec{B}$ at this point?

If $\vec{E}$ and $\vec{K}$ represent electric field and propagation vectors of the EM waves in vacuum, then magnetic field vector is given by: ($\omega\,-$ angular frequency)

Match List - I with List - II. List-I List-II (a) Source of microwave frequency (i) Radioactive decay of nucleus (b) Source of infrared frequency (ii) Magnetron (c) Source of Gamma Rays (iii) Inner shell electrons (d)…

Which of the following are not electromagnetic waves?

Match List - I (Electromagnetic wave type) with List - II (Its association/application) and select the correct option from the choices given below the lists : List - I List - II (a) Infrared waves (i) To treat muscular…

The correct match between the entries in column I and column II are : I II Radiation Wavelength a Microwave i $100m$ b Gamma rays ii $10^{-15}m$ c A.M. radio iii $10^{-10}m$ d X-rays iv $10^{-3}m$

Match List I (Wavelength range of electromagnetic spectrum) with List II(Method of production of these waves) and select the correct option from the options given below the lists. List I List II (a) $700\mathrm{nm}$ to…

The intensity of the light from a bulb incident on a surface is $0.22Wm^{-2}$. The amplitude of the magnetic field in this light-wave is _____$\times\,10^{-9}T$ (Given : Permittivity of vacuum…

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R Assertion A : EM waves used for optical communication have longer wavelengths than thatof microwave, employed in Radar…

If $2.5\times\,10^{-6}N$ average force is exerted by a light wave on a non-reflecting surface of $30\mathrm{cm}^{2}$ area during $40\min\,$ of time span, the energy flux of light just before it falls on the surface is…

Given below in the left column are different modes of communication using the kinds of waves given in the right column. (1) Optical Fibre Communication (P) Ultrasound (2) Radar (Q) Infrared Light (3) Sonar (R)…