Question

the given E0,E1 and E2 are the ground ,first and second electronic energy levels of the molecule.the energy gap between E0 to E2 is 50000cm-1 .a wavelength of 400nm is needed to excite the molecule from E0 to E1.sketch the energy level and calculate the wavelength of the radiation required for E1 to E2

Answer 1

The difference in energy between the two energy levels is 2.3eV.

To find: The frequency of radiation emitted when the atom makes a transition between the energy levels.

The energy between the energy levels is

E=2.3eV

⇒2.3×1.6×10

−19

J

The frequency of the radiations emitted during transition is:

E=hν

ν=

E

h

​

⇒

2.3×1.6×10

−19

6.626×10

−34

⇒5.5×10^ 14 Hz