Structure of Atom

Structure of Atom

Question

A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emission is at 680 nm, the other is at

  • 1035 nm

  • 325 nm

  • 743 nm 

  • 518 nm

Answer

C.

743 nm 

E = E1 + E2
hc over straight lambda space equals space hc over straight lambda subscript 1 space plus hc over straight lambda subscript 2
1 over straight lambda space equals space 1 over straight lambda subscript 1 space plus 1 over straight lambda subscript 2
1 over 355 space equals space 1 over 680 space plus 1 over straight lambda subscript 2
straight lambda subscript 2 space equals space 742.76 space nm

More Chapters from Structure of Atom