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

Respuesta :

Answer: The question is incomplete because the options are not given here are the options gotten from Another website.

A. Ultraviolet light detects the presence of radioactive substances.

B.Ultraviolet light shows cold areas as blue and warm areas as red.

C.Ultraviolet light causes substances to fluoresce and give off visible light.

D. Ultraviolet light transmits information to AM and FM radio receivers.

The correct option is C.

Ultraviolet light causes substances to fluoresce and give off visible light

Explanation:

This is because UV light radiates at a very short wavelengths compared to visible light which is impossible for humans to see it. Therefore , when UV light is absorbed by some particular materials, it reflect back towards the eye as visible radiation with a longer wavelength .This process is called UV-induced visible fluorescence.

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