If electrons in H-likes species jump, from `n_(3)` to `n_(1)` emitting photon of wavelength `lambda`, from `n_(3)` to intermediate orbit `n_(2)[n_(3)gtn_(2)gtn_(1)]` emits photon with wavelength `lambda_(1)` & from `n_(2)` to `n_(1)` emits photon with wavelength `lambda_(2)` then correct option is :

Options

A. `lambda=lambda_(1)+lambda_(2)`
B. `(1)/(lambda)=(1)/(lambda_(1))+(1)/lambda_(2)`
C. `lambda=(lambda_(1)-lambda_(2))/(lambda_(1)lambda_(2))`
D. None of these

Explanation

`E_(n_(3))-E_(n_(1))=(hc)/(lambda).....(1)`
`E_(n_(3))-E_(n_(2))=(hc)/(lambda_(1)).....(2)`
`E_(n_(2))-E_(n_(1))=(hc)/(lambda_(2)).....(3)`
`(2)+(3)=(1)implies (1)/(lambda)=(1)/(lambda_(1))+(1)/(lambda_(2))`