Electromagnetic radiation with a wavelength of 665 nm appears as orange light to the human eye. The energy of one photon of this light is __________ J.

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  1. E = h*c/L

    where E is the energy, h is planck's constant, c is the speed of light, and L is the wavelength.Wavelength is measure in meters, so convert 665nm to meters. I think it's 6.65*10^-7

    E=(6.626*10^-34 * 3*10^8)/6.65*10^-7

    I think that is how you work that one.

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  2. 2.99*10^-19

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