The energy of a 2.00-keV electron is known to within ± 3.00%. How accurately can its position be measured?
Answer to relevant Questions(a) If the lifetime of excited state A is longer than that of another excited state B, then the width of a spectral line due to natural broadening for a transition from state A to the ground state will be (1) smaller than, ...An electron is accelerated from rest through a potential difference of 100 V. What is the de Broglie wave-length of the electron? 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? Nuclide A has a decay constant that is half that of nuclide B. Samples of both types start with the same number of undecayed nuclei, N. In terms of N, after two of A’s half-lives have elapsed, (a) How many of type A have ...PET scans require extremely fast computers coupled with gamma- ray detectors capable of accurate energy measurements. Explain why both energy accuracy and comparison of arrival times are crucial to the success of a PET scan.
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