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Two moving electrons have a ratio of 1 :...

Two moving electrons have a ratio of `1 : 2` between their respective kinetic energies. The ratio between their de Broglie wavelength is

A

`2 : 1`

B

`sqrt2 : 1`

C

`1 : sqrt2`

D

`1 : 2`

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The correct Answer is:
B
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