Each Photon in a Beam of Light Has an Energy

question 17

Multiple Choice

Each photon in a beam of light has an energy of 4.20 eV.What is the wavelength of this light? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

• A)321 nm
• B)103 nm
• C)296 nm
• D)412 nm
• E)420 nm

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