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What is the frequency of a photon with an energy of 7.40 10-18 J? (The speed of light in a vacuum is 2.998 108 m/s. Planck's constant is 6.626 10-34 J·s.)

  • (physics/chemistry) -

    You may have got this question in a chem glass, but it is really about physics.

    E = h*frequency is the equation to use

    h is Planck's constant, which you were given.

    Solve for the frequency, in s^-1 (also called Hz)
    You don't need to use the speed of light to answer this question. You would need that for the wavelength.

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