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प्रश्न
Give one use of microwaves.
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उत्तर
Microwaves are used for satellite communication.
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संबंधित प्रश्न
State an additional use of the X-rays waves
What is the range of the wavelength of the following electromagnetic waves?
(a) Visible.
Find the cutoff wavelength for the continuous X-rays coming from an X-ray tube operating at 30 kV.
(Use Planck constant h = 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Find the maximum potential difference which may be applied across an X-ray tube with tungsten target without emitting any characteristic K or L X-ray. The energy levels of the tungsten atom with an electron knocked out are as follows.
| Cell containing vacancy | K | L | M |
| Energy in keV | 69.5 | 11.3 | 2.3 |
State two properties of infrared radiations which differ from visible light.
Give one use of electromagnetic radiation in Ultraviolet radiation.
Choose the correct option.
The EM wave emitted by the Sun and responsible for heating the Earth’s atmosphere due to greenhouse effect is
Name the e.m. waves which are suitable for radar systems used in aircraft navigation. Write the range of frequency of these waves.
If the Earth did not have atmosphere, would its average surface temperature be higher or lower than what it is now? Explain.
Name two electromagnetic waves of wavelength smaller than that of violet light.
