Question:
Gun powder residue on clothing can best be visualized by?
Gun powder residue on clothing can best be visualized by?
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Which rays can see through dark, blood-stained cloth to show the powder?
Updated On: Jun 24, 2026
- Magnifying lens
- UV rays
- Infrared rays
- Dye
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: The question concerns the detection of gun powder residue (tattooing/soot and unburnt powder) deposited on clothing around a firearm wound.
Step 2: When clothing is dark, bloodstained or charred, the powder particles are hidden to the naked eye and ordinary light.
Step 3: Infrared photography is used because infrared rays penetrate overlying blood and dark fabric and reveal the powder pattern, allowing the soot and powder tattooing to be visualized and the range of fire to be estimated.
Step 4: A magnifying lens only enlarges what is already visible, UV light is used for biological stains such as semen rather than powder on dark cloth, and dye tests are chemical color tests but are not the standard visualization method described here.
Conclusion: Gun powder on clothing is visualized by infrared rays, hence option C.
Step 2: When clothing is dark, bloodstained or charred, the powder particles are hidden to the naked eye and ordinary light.
Step 3: Infrared photography is used because infrared rays penetrate overlying blood and dark fabric and reveal the powder pattern, allowing the soot and powder tattooing to be visualized and the range of fire to be estimated.
Step 4: A magnifying lens only enlarges what is already visible, UV light is used for biological stains such as semen rather than powder on dark cloth, and dye tests are chemical color tests but are not the standard visualization method described here.
Conclusion: Gun powder on clothing is visualized by infrared rays, hence option C.
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