If the approximate energy of a photon present in an X-ray is 8.0 * 10-15 joules, what's the frequency of the X-ray? Given: Planck's constant is 6.63 * 10-34 joule·seconds.
(A) 1.2 * 1014 hertz
(B) 1.2 * 1019 hertz
(C) 8.2 * 1018 hertz
(D) 8.3 * 1019 hertz
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