Question #197107

6) The energy of a photon (in J), that has a frequency of 18.21 x 10^{15} s^{-1} is:

A. 1.21 x 10^{-17}

B. 5.44 x10^{-18}

C. 1.99 x 10^{-25}

D. 3.49 x10^{-48}

E. 5.44 x10^{18}

Expert's answer

E ( energy) = h (Plancks constant) x (frequency) f,

"Where, h= 6.626 \u00d7 10^{-34}"

"E=18.21\u00d710^{15} \u00d76.626 \u00d7 10^{-34} =1.21\u00d710^{-17}"

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