In the infrared region of the atomic spectrum of hydrogen

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in the infrared region of the atomic spectrum of hydrogen a line is obtained at 3802 cm^1. calculate energy? PLZZZZ ANS FAST TOMORROW EXAM OF MINE.... PLZZZZZ...

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We know that ,
  Frequency(v) can be calculated as follows:
     λv = c
     where λ = 3802 x 10-2 m
                c = 3 x 108 m/s
     Frequency, v = (3 x 108 m/s) / 3802 x 10-2m
                           = 7.89 x 106 s-1
Energy = hv
     where h = 6.626 x 10-34 J/s
Hence, energy of the photon
     =  6.626 x 10-34 J/s x 7.89 x 106 s-1
      =   52.279 x 10-28 J

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