A sample of hydrogen gas in its ground state is irrdation with photon of `10.2eV` energies The radiation from the above the sample is used to irradiate two other the sample of excited ionized `He^(+)` and excited ionized `Li^(2+)`, respectively . Both the ionized sample absorb the incident radiation.
An electron jumps from the `4^(th)` orbit to `2^(nd)` orbit of hydrogen atom . .Given the Rydberg's constant `r=10^(5)cm^(-1)`, the frequency in hertz of the emitted radiation will be

Options

A. `3/10xx10^(5)`
B. `3/16xx10^(15)`
C. `9/16xx10^(15)`
D. `3/4xx10^(15)`

Answer

C