Advertisements
Advertisements
प्रश्न
Can an electromagnetic wave be deflected by an electric field or a magnetic field?
उत्तर
No, an electromagnetic wave cannot be deflected by an electric field or a magnetic field. This is because according to Maxwell's theory, an electromagnetic wave does not interact with the static electric field and magnetic field. Even if we consider the particle nature of the wave, the photon is electrically neutral. So, it is not affected by the static magnetic and electric fields.
APPEARS IN
संबंधित प्रश्न
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
Suppose that the electric field amplitude of an electromagnetic wave is E0 = 120 N/C and that its frequency is v = 50.0 MHz.
- Determine B0, ω, k, and λ.
- Find expressions for E and B.
Suppose that the electric field part of an electromagnetic wave in vacuum is
`vec"E" = {(3.1"N"/"C") cos[(1.8 ("rad")/"m")"y" + (5.4 xx 10^8 ("rad")/"s")"t"]}hat"i"`
(a) What is the direction of propagation?
(b) What is the wavelength λ?
(c) What is the frequency v?
(d) What is the amplitude of the magnetic field part of the wave?
(e) Write an expression for the magnetic field part of the wave.
How is the speed of em-waves in vacuum determined by the electric and magnetic field?
Which segment of electromagnetic waves has highest frequency? How are these waves produced? Give one use of these waves.
Why is the amount of the momentum transferred by the em waves incident on the surface so small ?
In a microwave oven, the food is kept in a plastic container and the microwaves is directed towards the food. The food is cooked without melting or igniting the plastic container. Explain.
The energy associated with light of which of the following colours is minimum :
State any one property which is common to all electromagnetic waves.
The energy levels of an atom of a certain element are shown in the given figure. Which one of the transitions A, B, C, D or E will result in the emission of photons of electromagnetic radiation of wavelength 618.75 nm? Support your answer with mathematical calculations.
Write notes on Ampere-Maxwell law.
Write down Maxwell equations in integral form.
Wavelength λ and wave vector k are related by ______.
A plane electromagnetic wave travels in free space along x-axis. At a particular point in space, the electric field along y-axis is 9.3 Vm−1. The magnetic induction (B) along z-axis is:
For which frequency of light, the eye is most sensitive?
An EM wave of intensity I falls on a surface kept in vacuum and exerts radiation pressure p on it. Which of the following are true?
- Radiation pressure is `I/c` if the wave is totally absorbed.
- Radiation pressure is `I/c` if the wave is totally reflected.
- Radiation pressure is `(2I)/c` if the wave is totally reflected.
- Radiation pressure is in the range `I/c < p < (2I)/c` for real surfaces.
A plane electromagnetic wave with frequency of 30 MHz travels in free space. At particular point in space and time, electric field is 6 V/m. The magnetic field at this point will be x × 10-8 T. The value of x is ______.
An electromagnetic wave of frequency v = 3.0 MHz passes from vacuum into a dielectric medium with permittivity ∈ = 4.0. Then ______.
