Advertisements
Advertisements
Question
The electric and magnetic fields, associated with an electromagnetic wave, propagating along negative X-axis can be represented by ______.
Options
`vec"E" = "E"_circ hat"i" and vec"B" = "B"_circ hat"k"`
`vec"E" = "E"_circ hat"k" and vec"B" = "B"_circ hat"j"`
`vec"E" = "E"_circ hat"i" and vec"B" = "B"_circ hat"j"`
`vec"E" = "E"_circ hat"j" and vec"B" = "B"_circ hat"i"`
Solution
The electric and the magnetic fields, associated with an electromagnetic wave, propagating along negative X-axis can be represented by `underline(vec"E" = "E"_circ hat"k" and vec"B" = "B"_circ hat"j")`.
APPEARS IN
RELATED QUESTIONS
Write mathematical expressions for electric and magnetic fields of an electromagnetic wave propagating along the z-axis.
Arrange the following electromagnetic wave in the order of their increasing wavelength:
(a) γ- rays
(b) Microwaves
(c) X-rays
(d) Radio waves
A laser beam has intensity 2.5 × 1014 W m−2. Find amplitudes of electric and magnetic fields in the beam.
Which of the following is an electromagnetic wave?
The electric and magnetic fields of an electromagnetic wave are ______.
The electric field of a plane electromagnetic wave travelling in +ve z-direction is described by ______.
The velocity of light in vacuum can be changed by changing
An electromagnetic wave travels in vacuum along z direction: `E = ( E_1hati + E_2hatj ) cos (kz - ωt)`. Choose the correct options from the following:
- The associated magnetic field is given as `B = 1/c(E_1hati - E_2hatj) cos (kz - ωt)`.
- The associated magnetic field is given as `B = 1/c(E_1hati - E_2hatj) sin (kz - ωt)`.
- The given electromagnetic field is circularly polarised.
- The given electromagnetic wave is plane polarised.
Poynting vectors S is defined as a vector whose magnitude is equal to the wave intensity and whose direction is along the direction of wave propagation. Mathematically, it is given by `S = 1/mu_0 E xx B`. Show the nature of S vs t graph.
A 27 mW laser beam has a cross-sectional area of 10 mm2. The magnitude of the maximum electric field in this electromagnetic wave is given by:
[Given permittivity of space ∈0 = 9 × 10-12 SI units, Speed of light c = 3 108 m/s]
