If an excited state of an atom has a lifetime of 2.0 x 10-7 s, what is the minimum error associated with the measurement of the energy of this state?
Answer to relevant QuestionsThe energy of the first excited state of a hydrogen atom is –0.34eV ± 0.0003 eV. What is the minimum average lifetime for this state? What is the threshold energy for the production of an electron–positron pair? The average kinetic energy of a particle at a temperature of T is 3/2 kBT(Section 10.5). What is the wavelength of an electron at 20oC? How about a proton at the same temperature? A proton and an electron are accelerated from rest through the same potential difference V. What is the ratio of the de Broglie wavelength of an electron to that of a proton (to two significant figures)? Compared to 3He, the probability of absorbing a neutron is much less likely for 4He. Explain this using what you know about odd– even proton and neutron numbers.
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