Given the value of Rydberg constant is `10^(7)m^(-1)`, the waves number of the lest line of the Balmer series in hydrogen spectrum will be:

Options

A. `0.25xx10^(7)m^(-1)`
B. `2.5xx10^(7)m^(-1)`
C. `0.025xx10^(4)m^(-1)`
D. `0.5xx10^(7)m^(-1)`

Explanation

Here, `R=10^(7)m^(-1)`
The wave number of the last line of the Balmer series in hydrogen spectrum is given by
`(1)/(lambda)=R((1)/(2^(2))-(1)/(oo^(2)))=(R )/(4)=(10^(7))/(4)=0.25xx10^(7)m^(-1)`