Hydrogen `(""_(1)H^(1))`, Deuterium `(""_(1)H^(2))`, singly ionized Helium `(""_(2)He^(4))^(+)` and doubly ionized lithium `(""_(3)Li^(6))^(++)` all have one electron around the nucleus. Consider an electron transition from n = 2 to n = 1. If the wavelength of emitted radiation are `lambda_(1),lambda_(2),lambda_(3)` and `lambda_(4)` respectively then approximately which one of the following is correct?

Options

A. `lambda_(1)=2lambda_(2)=3lambda_(3)=4lambda_(4)`
B. `4lambda_(1)=2lambda_(2)=2lambda_(3)=lambda_(4)`
C. `lambda_(1)=2lambda_(2)=2lambda_(3)=lambda_(4)`
D. `lambda_(1)=lambda_(2)=4lambda_(3)=9lambda_(4)`

Answer

D