A Proton Has a Speed of 7 $10 ^ { 4 }$

question 34

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