Physics
The most energetic electromagnetic radiations are —
- microwaves
- ultraviolet waves
- X-rays
- gamma rays
Spectrum
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Answer
gamma rays
Reason — Gamma rays are the most energetic electromagnetic radiations of wavelength shorter than 0.01 nm and frequency above 1019 Hz.
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The correct arrangement of the following radiations in an increasing order of their wavelengths is :
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- infrared radiation
- visible light
- ultraviolet radiation
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Column X shows the kinds of electromagnetic waves and column Y shows their applications.
Column X Column Y (A) Infrared rays (i) in remote-controlled gadgets (B) Radio waves (ii) for transmission (C) X-rays (iii) for detection of bone fractures (D) Ultraviolet rays (iv) absorption by atmospheric ozone layer Choose the correct pairing :
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(a) Arrange the following radiations in the order of their increasing wavelength —
X-rays, infrared rays, radio waves, gamma rays and micro waves.(b) Name the radiation which is used for satellite communication?