What are electromagnetic waves?
(N/A) Electromagnetic waves are waves that are created as a result of vibrations between an electric field and a magnetic field.
In other words,electromagnetic waves are composed of oscillating electric and magnetic fields that are perpendicular to each other and to the direction of wave propagation.
These waves do not require a material medium for their propagation and can travel through a vacuum at the speed of light,$c \approx 3 \times 10^8 \ m/s$.
In other words,electromagnetic waves are composed of oscillating electric and magnetic fields that are perpendicular to each other and to the direction of wave propagation.
These waves do not require a material medium for their propagation and can travel through a vacuum at the speed of light,$c \approx 3 \times 10^8 \ m/s$.
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The magnetic field in a travelling electromagnetic wave has a peak value of $20 \ nT$. The peak value of electric field strength is ...... $Vm^{-1}$.
An electromagnetic wave travels along the $z$-axis. Which of the following pairs of space and time-varying fields would generate such a wave?
Medium
View SolutionThe energy associated with the electric field is $(U_E)$ and with the magnetic field is $(U_B)$ for an electromagnetic wave in free space. Then
Assertion $(A)$: Electromagnetic waves exert pressure,called radiation pressure.
Reason $(R)$: This is because they carry energy.
Reason $(R)$: This is because they carry energy.
An electromagnetic wave of intensity $50 \ W m^{-2}$ enters a medium of refractive index $n$ without any loss. The ratio of the magnitudes of electric fields and the ratio of the magnitudes of magnetic fields of the wave before and after entering the medium are respectively given by:
DifficultJEE MAIN 2019
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