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Dimensional Analysis

If V r , V X ...

Question

If $V_{r}, V_{X}$ and $V_{M}$ are the speeds of r-rays, X-rays and micro waves respectively in vacuum, then

A

V_{r}

<

V_{X}

<

V_{M}

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B

V_{r}

>

V_{X}

<

V_{M}

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C

V_{r}

>

V_{X}

>

V_{M}

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D

V_{r}

=

V_{X}

=

V_{M}

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Solution

The correct option is D $V_{r}$ = $V_{X}$ = $V_{M}$
The speed will be same as all are electromagnetic waves.

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