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if Helium atom and Hydrogen molecule are...

if Helium atom and Hydrogen molecule are moving with the same velocity , their wavelength ratio will be

A

`4:1`

B

`1:2`

C

`2:1`

D

`1:4`

Text Solution

Verified by Experts

The correct Answer is:
B
`lamdaprop1/m=lamda_(He)/lamda_(H_(2))=m_(H_(2))/m_(He)`
`lamda_(He)/lamda_(H_(2))=2/4=1:2`
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