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

Answer

C

Explanation

`1/(lambda)=R(1/(2^(2))-1/(oo))`
`bar(v)=R/4=0.25xx10^(7)m^(-1)`