JEE PHYSICS MCQ: ELECTROMAGNETIC WAVES

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\mathrm{v}_{\mathrm{s}}, \mathrm{v}_{\mathrm{x}}

and

\mathrm{v}_{\mathrm{m}}

are the speed of soft gamma rays,

\mathrm{X}

-rays and microwaves respectively in vacuum, then

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Correct option: D

\mathrm{v}_{\mathrm{s}}=\mathrm{v}_{\mathrm{x}}=\mathrm{v}_{\mathrm{m}}

Option D (

\mathrm{v}_{\mathrm{s}}=\mathrm{v}_{\mathrm{x}}=\mathrm{v}_{\mathrm{m}}

) is correct because all electromagnetic waves travel at the same speed (speed of light) in a vacuum.

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