Question

Fingerprints detection by sprinkling fluorescent powder.

Answer 1

Hint: Fingerprints are impressions left by friction ridges of these are quite important and area covered during a crime scene is an important method of forensic science fingerprint.

Complete answer:
Human fingerprints are unique, it is difficult to alter them and it is durable over the life of an individual. It is used by police and other authorities to identify the culprit.
fingerprint detection is one of the common methods used in criminal investigation. The method to identify fingerprint detection is Asphalt object completely.
when we need to detect fingerprints. It is collected with the help of a powder and then is immersed in a fluorescent solution for 2 to 5 minutes after which it can be viewed under black light.
The only visible spectrum is visible to human eyes. To view fluorescent substances, we need to expose them to UV light. Therefore, these fingerprints are exposed under ultraviolet radiations which helps them to be seen.

So, fingerprints detection by sprinkling fluorescent powder is done under UV radiation.

Note:
The easiest method to detect the fingerprint is by dusting by using thin powder that can stick to the oil of the fingerprint after which the fingerprint becomes visible. Then with the help of a clear tape it is transfer to the laboratory for further analysis