Question

The ratio of the longest and shortest wavelengths of the Lyman series is approximately
A. `(4)/(3)`
B. `(9)/(4)`
C. `(9)/(5)`
D. `(16)/(7)`

Answer 1

Correct Answer - A
`(1)/(lamda_(1))=R((1)/(1^(2))-(1)/(2^(2)))=(3R)/(4)`
`(1)/(lamda_(s))=R((1)/(1^(2))-(1)/(oo))=R`
`(ii)//(i) implies (lamda_(l))/(lamda_(s))=(R )/(3R//4)=(4)/(3)`