What Is the Energy of a Photon That Has a Wavelength

question 18

Multiple Choice

What is the energy of a photon that has a wavelength equal to the de Broglie wavelength of a proton having a speed of 7.1 × 10⁴ m/s? (mproton = 1.67 × 10^-27 kg, c = 3.00 × 10⁸ m/s)

• A) 220 keV
• B) 150 keV
• C) 290 keV
• D) 360 keV
• E) 440 keV

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