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प्रश्न
Name the parts of the electromagnetic spectrum which is
used to treat muscular strain.
Write in brief, how these waves can be produced.
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उत्तर
Infrared waves are used to treat muscular strain.
These rays are produced by hot bodies and molecules.
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संबंधित प्रश्न
Name the electromagnetic radiations used for (a) water purification, and (b) eye surgery.
Name the rays or waves of highest frequency .
Name the waves of wavelength nearly 0.1 nm.
The distance between the cathode (filament) and the target in an X-ray tube is 1.5 m. If the cutoff wavelength is 30 pm, find the electric field between the cathode and the target.
(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)
Write the range of the wavelength of the following electromagnetic radiations:
(a) Infrared rays
(b) Ultraviolet rays
(c) γ -rays
Write one use of each of the above.
Name the scientist who discovered radio waves
State three properties of ultra-violet radiation similar to visible light.
An e.m. wave exerts pressure on the surface on which it is incident. Justify.
Microwaves are electromagnetic waves with frequency in the range of.
