The lifetime of the excited state involved in a He–Ne laser of wavelength 832.8 nm is about 10-4 s. What is the ratio of the frequency width of a spectral line due to natural broadening to the frequency of the laser?
Answer to relevant QuestionsAn electron is accelerated from rest through a potential difference so that its de Broglie wavelength is 0.010 nm. What is the potential difference? In the Rutherford scattering experiment, the minimum distance of approach for the alpha particle is given by Eq. 29.1. Explain why this distance does not necessarily represent the nuclear radius. Is it larger or smaller than ...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. Determine the number of protons, neutrons, and electrons in a neutral atom with the following nuclei: (a) 90Zr and (b) 208Pb. A particular radioactive sample undergoes 2.50 x 106 decays/s. What is the activity of the sample in (a) Curies and (b) Becquerel’s?
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