Which diagram best represnts the apperance of the line spectrum of atomic hydorgen in the visible region?
`overset(Increasing lambda)rarr`

Options

A.
B.
C.
D.

Answer

B

Explanation

According to Rydberg's formula
`barv_(H) =(1)/(lambda_(H)) = R_(H) ((1)/(n^(2))-(1)/(m^(2)))`
If we increase `lambda_(H)`, then `((1)/(n^(2))-(1)/(m^(2)))` should decreases, since `1//n^(2)` is a constant. This implies that `1//m^(2)` should increase which is possible if we decrease `m`. As `m` decreases, the gap betweem the lines increases.