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Select the correct statement (s):...

Select the correct statement (s):

A

All electronmagnetic radiation travel with speed of light in vaccum .

B

Energy of photon of UV light id lower than that of yellow light .

C

`He^(2+)` and H have similar sepctrum.

D

The total energy of an electron in unielectron specie is greater than zero

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The correct Answer is:
A, C
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