Question

if the shortest wavelength of the spectral line of H atom in lyman series is x,then the shortest wavelength of the line in lyman series of He+ is?

Answer 1

Answer:

x/4

Explanation:

Formula for finding shortest wavelength,

lambda =n²/RZ²

1st case

(lambda)1= 1²/R=1/R=x

for Lyman series, n=1

for Hydrogen, Z=1

2nd case

(lambda)2=1²/R2²

=1/4R

=1/R into 1/4

=x/4

for Lyman, n=1

for Helium,z=2