First slide

Total internal reflection - Ray optics and optical instruments

Question

Finger prints on a piece of paper may be detected by sprinkling fluorescent powder on the paper and then looking it into

Moderate

A

Mercury light
B

Sunlight
C

Infrared light
D

Ultraviolet light

Solution

Using ultraviolet light for the detection of fingerprints is one of the common methods used in criminal investigations.

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