Question: the hydrogen spectrum shows 4 lines in the region visible...

The hydrogen spectrum shows 4 lines in the region visible spectral 
(this series is called the Balmer series: 
Hα (red): λ= 656.3 nm, 
Hβ (blue-green): λ = 481.1 nm,
 Hγ (purple): λ = 434.1 nm, and
Hλ (purple): λ = 410.2 nm). 

Another series in the hydrogen spectrum is the Lyman series. Determine the wavelength of the second line of the Lyman series
in m and nm (give two digits after the decimal point).