Electromagnetic Waves

The following table presents the part of the electromagnetic spectrum and their corresponding major applications. Part of the electromagnetic spectrumApplicationsP. MicrowaveI. For purifying the waterQ. UV raysII. For…

Match List - I with List - II: List - I (Electromagnetic waves) List - II (Wavelength) (a) AM radio waves (i) $10^{-10}m$ (b) Microwaves (ii) $10^{2}m$ (c) Infrared radiations (iii) $10^{-2}m$ (d) X-rays (iv) $10^{-4}m$…

Match List I with List II : List I (Electromagnetic wave)List II (Production)A. MicrowaveI. Electrons in atoms emit light when they move from a higher energy level to a lower energy levelB. Visible lightII. Radioactive…

An electromagnetic wave of frequency $3\mathrm{GHz}$ enters a dielectric medium of relative electric permittivity $2.25$ from vacuum. The wavelength of this wave in that medium will be…

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…

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)…

Match List I and List II A Gauss's Law inElectrostatics I $\oint\,\vec{E}\cdot\,\vec{dl}=-\frac{d\varphi\,_{B}}{dt}$ B Faraday's Law II $\oint\,\vec{B}\cdot\,d\vec{A}=0$ C Gauss's Law in Magnetism III…

The electric field in a plane electromagnetic wave is given by $\vec{E}=200\cos\,\left[\left(0.5\times\,10^{3}m^{-1}\right)x-\left(1.5\times\,10^{11}\rad\,s^{-1}\right)t\right]Vm^{-1}\hat{j}$. If this wave falls…

The electric field of a plane electromagnetic wave is given by$\vec{E}=E_{0}\left(\hat{x}+\hat{y}\right)\sin\,\left(kz-\omega\,t\right)$. Its magnetic field will be given by

The wavelength of an X-ray beam is $10\AA\,$. The mass of a fictitious particle having the sameenergy as that of the X-ray photons is $\frac{x}{3}h\mathrm{kg}.$ The value of $x$ is ___ .($h=$Planck's constant)

The energy density associated with electric field$\vec{E}$and magnetic field$\vec{B}$of an electromagnetic wave in free space is given by ($\epsilon\,_{0}-$permittivity of free space, $\mu\,_{0}-$permeability of free…

An electromagnetic wave of frequency 100 MHz propagates through a medium of conductivity, $\sigma=10 \mathrm{mho} / \mathrm{m}$. The ratio of maximum conduction current density to maximum displacement current density is…