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17 August, 01:06

What is the wavelength, in nm, of radiation with an energy of 2.668 x 10^ (-19) J

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  1. 17 August, 05:06
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    V=E/h

    v is the frequency

    h is the planks constant which is 6.626 x10^-34

    v is therefore [2.668 x 10^-19] / 6.626 x10^-34=4.027 x10^14

    c (speed of light) = wavelength x frequency

    c is always = 3.0 x10^8

    therefore wavelength = (3.08 x10^8) / 4.027 x 10^14=7.649 x10^-7

    convert to nm

    = (7.649 x10^-7) x (1.0 x 10 ^9 nm) = 764nm
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