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20 November, 14:16

A monochromatic beam of light has a frequency

of 7.69 * 10^14 hertz. What is the energy of a

photon of this light?

(1) 2.59 * 10^-40 J (3) 5.10 * 10^-19 J

(2) 6.92 * 10^-31 J (4) 3.90 * 10^-7 J

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Answers (1)
  1. 20 November, 15:26
    0
    (3) 5.10 x 10^-19 J E = hf = (6.62 x 10^-34 m^2 kg/s) x (7.69 x 10^14) Hz = 5.10 x 10^-19 J
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