A Proton Has a Speed of 7 $10^4$ M/s What Is the Energy of a Photon That Has

question 54

Multiple Choice

A proton has a speed of 7.2 x $10^4$ m/s. What is the energy of a photon that has the same wavelength as the de Broglie wavelength of this proton? (m_electron = 9.11 × 10^-31 kg, c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s)

• A) 230 keV
• B) 150 keV
• C) 300 keV
• D) 370 keV
• E) 440 keV

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