An electromagnetic wave has a frequency $f$ and wavelength $\lambda$ in a medium with refractive index $n$. If the same wave enters vacuum, which quantity remains unchanged?

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 $\lambda_2$?

All components of the electromagnetic spectrum in vacuum have the same

The wavelength of infrared rays is of the order of

The condition under which a microwave oven heats up a food item containing water molecules most efficiently in

If a non-reflecting surface receives $100 \, J$ of energy in $5 \, seconds$ from a light source with a flux of $4 \, W/m^2$, what is the area of the surface?

The electromagnetic waves travel with a velocity

A charged particle oscillates about its mean equilibrium position with a frequency of ${10^9}$ Hz. Frequency of the Electromagnetic Waves produced by the oscillator is

Which of these electromagnetic waves has the shortest wavelength?

An electromagnetic wave propagating along north has its electric field vector upwards. Its magnetic field vector point towards

If a source is transmitting Electromagnetic Waves of frequency $8.196 imes {10^6}$ Hz, then the wavelength of the Electromagnetic Waves transmitted from the source will be