A hydrogen atom in the ground state is excited by monochromatic ratiation of wavelength `lambda Å` . The resulting spectrum consists of maximum 15 different lines. What is the wavelength `lambda` ? `(R_H = 109677.8 cm^(-1))`

Options

A. `937.3 Å`
B. `1025 Å`
C. `1236 Å`
D. `1120 Å`

Answer

A

Explanation

No. of spectral lines `(n(n-1))/(2) = 15 implies n = 6`
`bar(upsilon) = 1/(lambda) = R(1/1 - 1/(36)) = (35R)/(36)`
`lambda =(36)/(35R) = 937.3A^@`