Question

The Hydrogen atom in its ground state is excited by means of a monochromatic radiation of wavelength 970.6A0 . How many different wavelengths (transitions) are possible in the resulting emission spectrum ? [NB: you have to represents them on a diagram]. Find the longest wavelength amongst these.

Answer 1

$\lambda_n=\frac 1 R\cdot \frac{n^2}{n^2-1},$

$\lambda_4=972~Å,$

$\lambda_3=1025~Å,$

$\lambda_2=1216~Å.$