What Is the Photon Energy of Red Light Having a Wavelength

question 42

Multiple Choice

What is the photon energy of red light having a wavelength of 6.40 × 10² nm? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

• A)1.13 × 10^-19 J
• B)1.31 × 10^-19 J
• C)3.11 × 10^-19 J
• D)1.94 × 10^-19 J

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