Question

Pertain to the following statement and figure

The figure above shown level diagram of the hydrogen atom. Serveral transition are market as I, II, III, … The diagram is only indicative and not to scale.
The wavelength of the radiation involved in transition II is:
A. `291 nm`
B. `364 nm`
C. `487 nm`
D. `652 nm`

Answer 1

Correct Answer - C
In transition II
`E_(2)= -3.4 eV, E_(4)= -0.85 eV`
`DeltaE= 2.55 eV`
`DeltaE=(hc)/(lambda)" " rArr lambda=(hc)/(DeltaE)`
`lambda=487 nm`.