Question

The energy levels of a certain atom for 1st, 2nd and 3rd levels are E, 4E/3 and 2E respectively. A photon of wavelength l is emitted for a transition 3 ® 1. What will be the wavelength of emission for transition 2 ®1 ?

• A. l/3
• B. 4l/3
• C. 3l/4
• D. 3l

Answer 1

Answer: (D)

3l

Answer 2

E = $\frac{hc}{\lambda}$