Question

Longest and shortest wavelength in paschen series

Answer 1

i dont know about longest wavelength but i know about shortest one:

The Paschen’s series is given by

1/λ = R (1/(n1)2 - 1/(n2)2 ) when n1 = 3, and n2 = 4, 5, 6…

Now the wavelength will be shortest if n2 = ∞

1/λ = R (1/(3)2 - 1/(∞)2 )

=> 1/λ = 1.0974×107(1/9 – 0)

=> 1/λ = 1.0974×107/9 = 1219333 m-1

=> λ = 8201 A

hope it helps!!☺☺

Answer 2

This is the answer for your given question please verify the final values!