A source emits electromagnetic radiation with a peak wavelength of $\lambda_1$ at temperature $T_1$. If the temperature is increased to $T_2 = 4T_1$, what will be the new peak wavelength $\lambda_2$?

The electromagnetic waves travel with a velocity

Which of the following is not electromagnetic in nature

If ${\lambda _v},{\lambda _r}\;and\;{\lambda _m}$ represent the wavelength of visible light $X$-rays and microwaves respectively, then

A wave is propagating in a medium of electric dielectric constant 2 and relative magnetic permeability 50. The wave impedance of such a medium is

Which of the following types of electromagnetic radiation is most likely to have a photon energy of 15 keV?

A radar sends the waves towards a distant object and receives the signal reflected by object. These waves are

The wavelength of infrared rays is of the order of

Light with an average flux of ${\rm{20}}\,\,{\rm{W/c}}{{\rm{m}}^{\rm{2}}}$ fall on a non-reflecting surface at normal incidence having surface area ${\rm{20}}\,\,{\rm{c}}{{\rm{m}}^{\rm{2}}}$. The energy received by the surface during time span of ${\rm{1}}$ minute is:

Which of these electromagnetic waves has the shortest wavelength?

A. The wavelength of microwaves is greater than that of UV-rays.B. The wavelength of IR rays is lesser than that of UV-rays.C. The wavelength of microwaves is lesser than that of IR-rays.D. Gamma rays have shortest wavelength in the Electromagnetic Spectrum.Of the above statements