Question

What is the wavelength in nanometres of the first line in the paschen series.

Answer 1

Answer:

Wavelength of the first line of Paschen series is `- (R = 109700 cm^-1`).

and 109700 cm^–1 = 91.16 nm

(91 nm is in the Vacuum UV wavelength region.

So, Wavelength of the first line of Paschen series is `- (R = 91.16 nm).