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Electromagnetic waves with wave length are given. Arrange these wavelengths in decreasing order of magnitude
a) $λ_{1}$ are used to treat muscular strain b) $λ_{2}$ are used by a FM radio station for broadcasting
c) $λ_{3}$ are used to detect fracture in bones d) $λ_{4}$ are absorbed by the ozone layer of the atmosphere

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$λ_{1} > λ_{2} > λ_{3} > λ_{4}$

$λ_{2} > λ_{1} > λ_{4} > λ_{3}$

$λ_{1} < λ_{2} < λ_{3} < λ_{4}$

$λ_{1} > λ_{2} < λ_{3} < λ_{4}$

answer is B.

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Detailed Solution

$λ_{1}$ belongs to Infrared radiations
$λ_{2}$ belongs to VHF radiations
$λ_{3}$ belongs to X-rays
$λ_{4}$ belongs to ultraviolet rays

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