Energy of a photon with a wavelength of 450 nm is

Energy of a photon with a wavelength of 450 nm is

  1. A

    4.36×10-12ergs

  2. B

    4.36×10-13ergs

  3. C

    4.36×10-20ergs

  4. D

    4.36×10-11ergs

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    Solution:

    According to Max Planck’s equation,

    E=hcλeqn1

    Here h is Planck’s constant and c is speed of light. 

    The wave length of photon λ = 450nm

    h=6.625×10-27ergs.sec

    c=3×1010cm/sec

    From equation 1, the energy of photon is

    E=6.625×10-27ergs.sec×3×1010cm.sec-1450×10-7cmE=4.36×10-12ergs

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