Question (1 Viewer)

[allGenreGamer]

A quick question:

A photon is emitted from an electron falling from an orbit where its energy is -2.7eV to one where it has -21.3eV (1eV = 1.6 * 10 ^ (-19) J), find its wavelength and frequency.

Can somebody please tell me which formulas to use? Thanks..

 

[xiao1985]

E = hf
c = f lamda

 

[t-i-m-m-y]

I must admit, the reason why I clicked on this thread was because the title was so informative. It seemed to contain a question within it!

 

[Tommy_Lamp]

E = (hc)/lambda