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प्रश्न
Which radiation is used for satellite communication?
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उत्तर
Microwave is used for satellite communication.
संबंधित प्रश्न
Identify the part of the electromagnetic spectrum which is:
produced by bombarding a metal target by high speed electrons.
Name two sources, each of infrared radiations and ultraviolet radiations.
Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?
The wavelengths of Kα and Lα X-rays of a material are 21.3 pm and 141 pm respectively. Find the wavelength of Kβ X-ray of the material.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Name three radiations and their wavelength range which are invisible and beyond the violet end of the visible spectrum.
How will you investigate the existence of the radiation beyond the red and violet extremes of the spectrum?
State three properties of ultra-violet radiation similar to visible light.
Light of wavelength `3500A` is incident on two metals A and B whose work functions are 3.2 eV and 1.9 eV respectively. Which metal will emit photoelectrons?
The frequency of x-rays, y-rays and ultraviolet rays are respectively a, b and c. Then:-
Give any two uses of infrared waves.
