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Microwaves

IF vs, vx a...

Question

IF $v_{s}, v_{x}$ and $v_{m}$ are the speeds of gamma rays X-rays and microwaves respectively in vacuum, then:

A

v_{s} > v_{x} > v_{m}

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B

v_{s} < v_{x} < v_{m}

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C

v_{s} < v_{x} > v_{m}

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D

v_{s} = v_{x} = v_{m}

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Solution

The correct option is D $v_{s} = v_{x} = v_{m}$
These all above mentioned rays are electromagnetic waves and all magnetic waves have same speed in same medium.
The speed of these waves in vacuum are equal to each other and to the speed of light in vacuum.
$v_{s} = v_{x} = v_{m} = c_{0}$

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