Ashley F.

asked • 10/20/16

Calculate the energy of one photon of yellow light in J that has a wavelength of 425nm

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Alejandro L.

I just wanted to point out that a wavelength of 425nm corresponds to blue/violet light and not yellow. Be careful not to confuse absorption and residual color with the actual photon wavelength.
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10/20/16

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Zachary D. answered • 10/20/16

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Energy, E, is equal to the product of the planck constant, h, and the frequency.  Since frequency is equal to the speed of light, c, divided by the wavelength, λ, the energy of a photon is E = hc/λ.  h is equal to 6.62607004 × 10e-34 m^2kg/s, and c is 3.00 x 10e8 m/s.
 
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