In the given electromagnetic wave , intensity of the associated light beam is (in )
(Given ) [2024]
729
243
972
486
(4)
Intensity,
A plane electromagnetic wave propagating in x-direction is described by
The intensity of the wave is
(Use ) [2024]
(2)
In a plane EM wave, the electric field oscillates sinusoidally at a frequency of and an amplitude of . The total average energy density of the electromagnetic field of the wave is [Use ] [2024]
(1)
Due to presence of an em-wave whose electric component is given by E = 100 sin (t – kx) , a cylinder of length 200 cm holds certain amount of em-energy inside it. If another cylinder of same length but half diameter than previous one holds same amount of em-energy, the magnitude of the electric field of the corresponding em-wave should be modified as [2025]
25 sin (t – kx)
200 sin (t – kx)
400 sin (t – kx)
50 sin (t – kx)
(3)
Speed of the light,
As, = along y-axis
= along negative x-axis
Hence, = along z-axis
The unit of is:
( = intensity of an electromagnetic wave, c : speed of light) [2025]
Vm
NC
Nm
(4)
Speed of light
So,