The difference between the longest wavlength line of the Balmar series and shortest wavelength line of the Lyman series for a hydrogen like atom (atomic number Z) equal to Deltalambda. The value of the Rydberg constant for the given atom is

Options

A. `(5)/(31) (1) (Delta lamda Z^2)`
B. `(5)/(36) (Z^2)/(Delta lamda )`
C. `(31)/(5) (1)/(Delta lamda Z^2)`
D. none of these

Answer

C

Explanation

`(31)/(5) (1)/(Delta lamda Z^2)`