de-Broglie proposed the dual nature of electron and put forward his wave concept. The wave length of electron in an orbit was given by `lambda =h/(mv)`
The wavelength of moving electron in `3^(rd)` Bohr orbit of H-atom is

Options

A. `1xx10^(-9)` m
B. `2xx10^(-7)` m
C. `1xx10^(-7)` m
D. `1xx10^(-8)` cm

Answer

A

Explanation

`V = (2.18xx 10^6)/(3) ` m/sec , `lambda = h/(mv)`