A-level Physics · Photons

Photon energy in eV

Find a photon's energy in eV from its wavelength or frequency, or its wavelength from eV.

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Question 1

A photon of visible light has a wavelength of 674 nm. Calculate the energy of the photon in eV. Use h = 6.63×10−346.63 \times 10^{-34} J s, c = 3.00×1083.00 \times 10^{8} m s⁻¹ and e = 1.60×10−191.60 \times 10^{-19} C. Give your answer to 3 significant figures.

eV

You can type 4.53, 3.2e-5, 3.2 × 10^-5 or 7/3.

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