School of Physics Lecture Demonstration Manual

Ultraviolet light

Oi-1 Fluorescence

Published: Wednesday 15 March 2006

To demonstrate fluorescence: i.e. Certain excited atoms will emit a photon of lower energy than the incident photon that caused the transition. If the process takes place rapidly (< 10 ^-7 sec) it is called Fluorescence.

Oi-2 Phosphorescence

Published: Wednesday 15 March 2006

To demonstrate that a phosphorescent material when irradiated with UV light will emit light of a lower energy for an appreciable interval of time.

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