Find the velocity of an electron emitted by a metal with a threshold frequency of 2.25 * 1014 s-1 when it is exposed to visible light of wavelength 5.00 * 10-7 m.
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Find the frequency of the visible light: frequency = speed of light/wavelength
2. If the frequency is less than the threshold frequency, nothing will happen. If it is greater than the threshold frequency then calculate the energy released.
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