The energy levels of a hypothetical atom are shown below. Which of the shown transitions will result in the emission of a photon of wavelength 275 nm?

Which of these transitions correspond to emission of radiation of (i) maximum and (ii) minimum wavelength? 

Given, wavelength of the photon,  = 275 nm

Energy of the photon is given by,

 

This corresponds to transition B as from the figure.

i)    
For maximum wavelength  should be minimum.

Minimum energy corresponds to transition A.

ii) For minimum wavelength,  should be maximum. Maximum energy corresponds to transition D.