A crime scene investigator wants to use a forensic lamp to look for particles on a carpet at a crime scene. Which technique will she use to find the particle evidence

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29-04-2020
Physics

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A crime scene investigator wants to use a forensic lamp to look for particles on a carpet at a crime scene. Which technique will she use to find the particle evidence

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tochjosh tochjosh · Answer 1 · 2020-04-30T04:18:46+02:00

Answer:

She will use the principle of luminescence of material under a particular wavelenght of light.

Explanation:

The forensic lamp is used to locate evidence that would usually be invisible to the naked eye.

Forensic lamp produces light at a specific wavelength of the electromagnetic spectrum (usually ultraviolet, blue or green).

Certain substances (usually biological based like saliva, semen, etc.) will glow under the forensic lamp in a phenomenon known as ‘fluorescence’. Fluorescence occurs when a molecule absorbs light of a particular wavelength and then emits a different coloured light back.