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प्रश्न
Which of the following is NOT true for electromagnetic waves?
विकल्प
it transports energy
it transports momentum
it transports angular momentum
in vacuum, it travels with different speeds which depend on their frequency
उत्तर
in vacuum, it travels with different speeds which depend on their frequency
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संबंधित प्रश्न
When Sunita, a class XII student, came to know that her parents are planning to rent out the top floor of their house to a mobile company she protested. She tried hard to convince her parents that this move would be a health hazard.
Ultimately her parents agreed :
(1) In what way can the setting up of transmission tower by a mobile company in a residential colony prove to be injurious to health?
(2) By objecting to this move of her parents, what value did Sunita display?
(3) Estimate the range of e.m. waves which can be transmitted by an antenna of height 20 m. (Given radius of the earth = 6400 km)
Write the expression for speed of electromagnetic waves in a medium of electrical permittivity ε and magnetic permeability μ.
The electric and magnetic fields of an electromagnetic wave are ______.
What is displacement current?
Write notes on Gauss' law in magnetism.
Discuss the Hertz experiment.
The velocity of light in vacuum can be changed by changing
A plane electromagnetic wave propagating along x direction can have the following pairs of E and B.
- Ex, By.
- Ey, Bz.
- Bx, Ey.
- Ex, By.
A charged particle oscillates about its mean equilibrium position with a frequency of 109 Hz. The electromagnetic waves produced ______.
- will have frequency of 109 Hz.
- will have frequency of 2 × 109 Hz.
- will have a wavelength of 0.3 m.
- fall in the region of radiowaves.
Name the electromagnetic wave/radiation which is used to study crystal structure.
