# Answer on Atomic and Nuclear Physics Question for Dalton McGerr

Question #18711

What is the energy of a photon whose frequency is 2.22 x 10^14 s^-1?

Expert's answer

Theenergy of a photon is given by the Planck-Einstein relation:

E = hf

where f is the frequency of the photon and h is Planck's constant (6.626 x 10E-34 J s).

Substituting f = 2.22 x 10E14 s-¹ gives E = 1.47 x10E-19 J (to 3 sf).

E = hf

where f is the frequency of the photon and h is Planck's constant (6.626 x 10E-34 J s).

Substituting f = 2.22 x 10E14 s-¹ gives E = 1.47 x10E-19 J (to 3 sf).

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