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? (m_proton = 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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The de Broglie wavelength λ of a proton is given by λ = h / (m * v), where h is Planck's constant (6.626 × 10^-34 Js), m is the mass of the proton, and v is its velocity. Calculate λ and then use E = hc / λ to find the energy of the photon. The energy is approximately 220 keV.

What Is the Energy of a Photon That Has a Wavelength