Question

F Centre can be observed if?

Answer 1

Answer:

The F-centers are point defects and can be readily formed in alkaline halides with the aid of a source of ionizing radiation, such as an X-ray source. Apparently, the ionizing radiation causes the loss of electrons from halide ions. An electron then becomes trapped in the halide ion vacancy.

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Answer 2

Answer:

An F center, frabe center or color center from the original German Farbzenturm, where Frabe means color and zenturm means center is a type of crystallographic defect in which an anionic vacancy in a crystal lattice is occupied by one or more unpaired electron....