Question

The figure shows an energy level diagram for the hydrogen atom. Several transitions are marked as I, II, III,_____. The diagram is only indicative and not be scale.

In which transitions is a Balmer photn absorbed?
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`
`Delta=2.55 eV, DeltaE=(hc)/lambda implies lambda=(hc)/(Delta E)=487 nm`.