The secret structure of great talks
18:00
TEDNancy Duarte
The secret structure of great talks
From the "I have a dream" speech to Steve Jobs' iPhone launch, many great talks have a common structure that helps their message resonate with listeners. In this talk, presentation expert Nancy Duarte shares practical lessons on how to make a powerful call-to-action.
3.8M viewsFeb 5, 2012
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Hyperfine structure When studied by means of high-resolution spectroscopy, the resonance line 4  s^2  S1 / 2-4 p^2 P1 / 2 of naturally-occurring potassium consists of four components with spacings and intensity ratios as shown in the following diagram.Natural potassium is a mixture of ^39  K and ^41  K in the ratio 14: 1. Explain the origin of the structure, and deduce the nuclear spins and the ratio of the magnetic moments of the two isotopes. | Numerade
Hyperfine structure When studied by means of high-resolution spectroscopy, the resonance line 4  s^2  S1 / 2-4 p^2 P1 / 2 of naturally-occurring potassium consists of four components with spacings and intensity ratios as shown in the following diagram.Natural potassium is a mixture of ^39  K and ^41  K in the ratio 14: 1. Explain the origin of the structure, and deduce the nuclear spins and the ratio of the magnetic moments of the two isotopes. | Numerade
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