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Wave number of spectral line for a given...

Wave number of spectral line for a given transition is `x cm^(-1)` for `He^(+)`, then its value for `Be^(3+)` (isoelectronic of `He^(+))` for same transition is:

A

`x cm^(-1)`

B

`4x cm^(-1)`

C

`(x)/(4) cm^(-1)`

D

`2x cm^(-1)`

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Verified by Experts

The correct Answer is:
B
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