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प्रश्न
Name the region beyond the red end of the spectrum.
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उत्तर
Infrared region.
संबंधित प्रश्न
State an additional use of the X-rays waves
(a) Give a list of at least five radiations, in order of their increasing frequencies, which make up the complete electromagnetic spectrum.
(b) Which of the radiation mentioned by you in part (a) has the highest penetrating power.
Give one use of gamma rays.
Name the waves produced by the changes in the nucleus of an atom.
Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?
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.)
Gamma rays and radio waves travel with the same velocity in free space. Distinguish between them in terms of their origin and the main application.
Find the photon energy in units of ev for electromagnetic wave if waves length 40 m. Given h = 6.63 × 10–34 J.
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 group of activities uses radio waves?
