The relationship between energy and frequency for light is given by the equation E = hf, where h is Planck's constant and f is the frequency of the photon in m/s.
In this problem you have the wavelength, 426 nm, but the frequency is 1/wavelength. !/426 nm = 2.347 x...
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The relationship between energy and frequency for light is given by the equation E = hf, where h is Planck's constant and f is the frequency of the photon in m/s.
In this problem you have the wavelength, 426 nm, but the frequency is 1/wavelength. !/426 nm = 2.347 x 10^6 Hz. Planck's constant is 6.626 x 10^-34 J/s. Multiplying the two values gives an answer of 1.555 x 10^-27 J of energy.