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Select the correct statement(s) :...

Select the correct statement(s) :

A

All electromagnetic radiation travel with speed of light in vaccum.

B

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

C

`He ^(+)` and H have similar spectrum.

D

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

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The correct Answer is:
A, C
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