If humans cannot see ultraviolet waves how can ultraviolet light be used to gather evidence of a crime

Question

03-11-2020
Physics

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If humans cannot see ultraviolet waves how can ultraviolet light be used to gather evidence of a crime

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pfellas pfellas · Answer 1 · 2020-11-03T01:27:53+01:00

pfellas pfellas

03-11-2020

Ultraviolet light is invisible but it gets absorbed by body fluids like blood or semen and can be re-emitted as visible light. In a darkened crime scene, body fluids will show up and can be collected and analysed.

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Laylafoxy123 Laylafoxy123 · Answer 2 · 2020-11-03T01:28:02+01:00

Laylafoxy123 Laylafoxy123

03-11-2020

Answer:

Ultra violet detects the presence of radioactive substances. Ultra violet light causes substances to fluoresce and give off visible light.

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