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प्रश्न
Identify the part of the electromagnetic spectrum which:
- produces the heating effect.
- is absorbed by the ozone layer in the atmosphere.
- is used for studying crystal structure.
Write any one method of the production of each of the above radiations.
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उत्तर
- Infrared
- Ultraviolet
- X rays
Method of production:
- Infrared: By Nernst lamp.
- Ultraviolet: By arc of mercury.
- Xray: By Coolidge tube.
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संबंधित प्रश्न
The terminology of different parts of the electromagnetic spectrum is given in the text. Use the formula E = hv (for energy of a quantum of radiation: photon) and obtain the photon energy in units of eV for different parts of the electromagnetic spectrum. In what way are the different scales of photon energies that you obtain related to the sources of electromagnetic radiation?
Give a reason for the following:
Long-distance radio broadcasts use short-wave bands. Why?
Give one use of gamma rays.
Identify the part of the electromagnetic spectrum used in
(i) radar and
(ii) eye surgery. Write their frequency range.
Give one use of electromagnetic radiation in Ultraviolet radiation.
X-rays, gamma rays and microwaves travelling in a vacuum have ______.
Electromagnetic waves of wavelengths λ1, λ2 and λ3 are used in a radar system, in water purifiers and in remote switches of TV, respectively.
- Identify the electromagnetic waves.
- Write one source for each of them.
Which devices commonly produce microwaves?
How does the frequency of infrared radiation compare with that of microwaves?
What gives rise to gamma rays?
