Find the ratio of de Broglie wavelength of molecules of hydrogen and helium which are at temperatures `27^circ` and `127^circC`, respectively.

Answer

2

Explanation

Since, `lambda = (h)/(mv) = (h)/(sqrt(3mKT)),`
`(lambda_(H))/(lambda_(He))=sqrt((m_(He)T_(He))/(m_(H)T_(H)))=sqrt((8)/(3))`