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Find the ratio of de Broglie wavelength ...

Find the ratio of de Broglie wavelength of molecules of hydrogen and helium which are at temperatures ` 27^(@) " and " 127^(@) C ` respectively

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de-Broglie wavelength is given by
`(lambdaH_(2))/(lambda_(H_(e )))=sqrt((m_(He)T_(He))/(m_(H_(2)T_(H_(2)))))=sqrt((4)/(2).((127+273))/((27+273)))=sqrt((8)/(3))`
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