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

Explanation

Since, `lamda=(h)/(mv)=(h)/(sqrt(3mkT))`
`(lamda_(H))/(lamda_(He))=sqrt((m_(He)T_(He))/(m_(H)T_(H)))=sqrt((8)/(3))`