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.

Question

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)

A) 677 nm

B) 218 nm

C) 345 nm

D) 428 nm

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MichaelMet 6 months 2021-07-26T08:47:17+00:00 1 Answers 4 views 0

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    2021-07-26T08:49:12+00:00

    Answer:

    The correct option is D.

    Explanation:

    The wavelength of the photon can be calculated with the following equation:

     E = h\frac{c}{\lambda}

    Where:

    E: is the energy of the photon = 2.90 eV

    h: is the Planck’s constant = 6.62×10⁻³⁴ J.s

    c: is the speed of light = 3×10⁸ m/s

    λ: is the wavelength

    Hence, the photon’s wavelength is:

     \lambda = \frac{hc}{E} = \frac{6.62 \cdot 10^{-34} J*s*3.0 \cdot 10^{8} m/s}{2. 90 eV*\frac{1.6 \cdot 10^{-19} J}{1 eV}} = 428 nm

    Therefore, the correct option is D.

    I hope it helps you!

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