forbidden transition

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Woman tied to a ducking stool, a method of punishment by means of humiliation, beating, or death. (cucking stool)

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A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

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Title: Senate Square, St. Petersburg, December 14, 1825: repression of the troop mutiny - watercolor by Carl Ivanovitch Kollman, 1825 depicts Decembrist uprising clashing with cavalry, with spectators watching. (new style December 26, 1825) Europe. Saint

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An ancient egyptian hieroglyphic painted carving showing the falcon headed god Horus seated on a throne and holding a golden fly whisk. Before him are the Pharoah Seti and the goddess Isis. Interior wall of the temple to Osiris at Abydos, Egypt.

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Pro and Con: School Uniforms

forbidden transition

physics

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atomic spectra

In spectroscopy: Atomic transitions
…classified as either allowed or forbidden, depending on the probability of their occurrence. In some instances, as, for example, when both the initial and final states have a total angular momentum equal to zero, there can be no single photon transition between states of any kind. The allowed transitions obey…
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selection rule

In selection rule
…high probability of occurring, or “forbidden transitions,” those that have minimal or no probability of occurring. Selection rules usually are stated as sets of changes in one or more quantum numbers that characterize properties changed by the transition in question.
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transitions

In transition
Forbidden transitions, on the other hand, are those that have a high probability of not occurring. A strictly forbidden transition is one that cannot occur at all.
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