PLEASE HELP ME WITH THIS ONE QUESTION A photon has 2.90 eV of energy. What is the photon’s wavelength? (h = 6.626 x 10^-19, 1 eV = 1.

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PLEASE HELP ME WITH THIS ONE QUESTION
A photon has 2.90 eV of energy. What is the photon’s wavelength? (h = 6.626 x 10^-19, 1 eV = 1.6 x 10^-19 J)

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Đan Thu 6 months 2021-07-13T15:56:03+00:00 1 Answers 5 views 0

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    2021-07-13T15:57:13+00:00

    Explanation:

    First, we convert the energy from eV to Joules:

    2.90\:\text{eV}×\left(\dfrac{1.6×10{-19}\:J}{1\:\text{eV}} \right)

    = 4.64×10^{-19}\:\text{eV}

    We know from definition that

    E=h\nu = \dfrac{hc}{\lambda}

    so the wavelength of the photon is

    \lambda = \dfrac{hc}{E} = 4.28×10^8\:\text{m}

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