1.

An electron and proton move in same direction with equal kinetic energy.Ratio of de-Broglie wavelength will be….

Answer»

`(m_(2))/(m_(p))`
`(m_(p))/(m_(e))`
`sqrt((m_(p))/(m_(e)))`
`m_(p).m_(e)`

SOLUTION :`lambda=(H)/(p)` but p`=sqrt(2mK)`
`therefore In lambda =(h)/(sqrt(2mK)),(h)/(sqrt(2K))` is constant.
`therefore lambda prop (1)/(sqrt(m))`
`therefore (lambda_(e))/(lambda_(p))=sqrt((m_(p))/(m_(e)))`


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