The wavelength of radiation required to remove the electron of hydrogen atom `("Ionisation energy "21.7xx10^(-12)"erg")` from n=2 orbit to `n = oo`is

Options

A. `3.664xx10^(-4)` cm
B. `3.66xx10^(-5)` cm
C. `3.66xx10^(-6)` cm
D. `3.664xx10^(-7)` cm

Answer

B

Explanation

`barv = 1/(lambda) = R (1/(n_1^2 - 1/(n_2^2)))`