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प्रश्न
Name the part of the electromagnetic spectrum which is:
Suitable for radar systems used in aircraft navigation.
उत्तर
Microwaves or short radio waves.
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संबंधित प्रश्न
Identify the part of the electromagnetic spectrum which is suitable for radar system used in aircraft navigation.
To which part of the electromagnetic spectrum does a wave of frequency 5 × 1011 Hz belong?
Name two electromagnetic waves of frequency smaller than that of violet light. State one use of each.
Name of physical quantity which remains same for microwaves of wavelength 1 mm and UV radiations of 1600 Å in vacuum.
What potential difference should be applied across an X-ray tube to get X-ray of wavelength not less than 0.10 nm? What is the maximum energy of a photon of this X-ray in joule?
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
An X-ray tube operates at 40 kV. Suppose the electron converts 70% of its energy into a photon at each collision. Find the lowest there wavelengths emitted from the tube. Neglect the energy imparted to the atom with which the electron collides.
(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.
Answer briefly.
Why are microwaves used in radar?
Answer briefly.
Why high-frequency carrier waves are used for the transmission of audio signals?
