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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Quizplus · Accepted Answer

The de Broglie wavelength of the proton is calculated using λ = h / (mv). Then, using this wavelength, the energy of a photon is calculated using E = hc / λ. The calculations yield approximately 230 keV.

A Proton Has a Speed of 7 10410 ^ { 4 }104

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