1.

A hydrogen molecule and helium atom are moving with the same velocity. Then the ratio of their de Brogile wavelength is

Answer»

`3.313xx10^(-20)CM^(-1)`
`5.012xx10^(-20)cm^(-1)`
`8.325xx10^(-20)cm^(-1)`
`5.27xx10^(-21)cm^(-1)`

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