An electron and a positron are moving toward each other and each has speed 0.490c in...

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An electron and a positron are moving toward each other and each has speed 0.490c in the lab frame. Part A What is the kinetic energy of each particle? Enter your answers in joules separated by a comma. VO Ke-, Ke+ = Part B 0 ? J The e+ and emeet head-on and annihilate. What is the energy of each photon that is produced? Express your answer in joules. Eph = Part C What is the wavelength of each photon? Express your answer in meters. = Submit Request Answer Part D ? ? B J How does the wavelength compare to the photon wavelength when the initial kinetic energy of the e+ and e- is negligibly small? Select the correct answer and explanation. When the particles also have kinetic energy, the energy of each photon is greater, so its wavelength is greater. When the particles also have kinetic energy, the energy of each photon is smaller, so its wavelength is greater. When the particles also have kinetic energy, the energy of each photon is greater, so its wavelength is smaller. When the particles also have kinetic energy, the energy of each photon is smaller, so its wavelength is smaller. Submit Request Answer An electron and a positron are moving toward each other and each has speed 0.490c in the lab frame. Part A What is the kinetic energy of each particle? Enter your answers in joules separated by a comma. VO Ke-, Ke+ = Part B 0 ? J The e+ and emeet head-on and annihilate. What is the energy of each photon that is produced? Express your answer in joules. Eph = Part C What is the wavelength of each photon? Express your answer in meters. = Submit Request Answer Part D ? ? B J How does the wavelength compare to the photon wavelength when the initial kinetic energy of the e+ and e- is negligibly small? Select the correct answer and explanation. When the particles also have kinetic energy, the energy of each photon is greater, so its wavelength is greater. When the particles also have kinetic energy, the energy of each photon is smaller, so its wavelength is greater. When the particles also have kinetic energy, the energy of each photon is greater, so its wavelength is smaller. When the particles also have kinetic energy, the energy of each photon is smaller, so its wavelength is smaller. Submit Request Answer