Fingerprint Light & Powder Methods

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Latent prints under light & powders

Créé par

Christa Grace D

India

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Fingerprint Light & Powder Methods


Froggy Jumps Fingerprint Light & Powder MethodsVersion en ligne Latent prints under light & powders par Christa Grace D 1 Which light technique helps reveal latent fingerprints by casting oblique shadows on residues? a Direct overhead lighting b Oblique/side lighting c Infrared alone 2 What is the primary purpose of using fluorescent powders in print development? a To emit visible light under UV/alternate light b To scratch the surface c To absorb moisture 3 Which light wavelength is commonly used to excite fluorescent powders in fingerprint work? a 700 nm (red) b 1200 nm (IR) c 365–450 nm (UV-A/blue range) 4 Magnetic powders are particularly useful on which type of surface? a Porous or textured surfaces b Glossy plastics c Smooth metals 5 Which technique uses shortwave UV light to reveal latent prints with fluorescence? a Visible white light b Infrared reflectography c Alternate light source (ALS) with UV 6 In powder dusting, what is the function of using a tackifier or binder? a Colorize the print b Erase ridges c Help powder adhere to residues 7 Which property of fingerprint residues is most exploited by fluorescent powders? a Ink contamination b Fluorophore components in eccrine secretions c Metallic impurities 8 What is a common non-destructive method to visualize prints on non-porous surfaces? a Powder dusting with adhesive lifting b Sanding the surface c Chemical reagents only 9 Which visual aid enhances contrast when using black magnetic powder on dark surfaces? a Direct sunlight b Underwater illumination c Oblique lighting to highlight texture 10 What is a key safety consideration when applying powders and lights in fingerprint work? a Operate without PPE b Ignore ventilation c Avoid skin contact and monitor chemical exposure

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Fingerprint Light & Powder Methods

Froggy Jumps

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Fingerprint Light & Powder MethodsVersion en ligne

par Christa Grace D

Which light technique helps reveal latent fingerprints by casting oblique shadows on residues?

What is the primary purpose of using fluorescent powders in print development?

Which light wavelength is commonly used to excite fluorescent powders in fingerprint work?

Magnetic powders are particularly useful on which type of surface?

Which technique uses shortwave UV light to reveal latent prints with fluorescence?

In powder dusting, what is the function of using a tackifier or binder?

Which property of fingerprint residues is most exploited by fluorescent powders?

What is a common non-destructive method to visualize prints on non-porous surfaces?

Which visual aid enhances contrast when using black magnetic powder on dark surfaces?

What is a key safety consideration when applying powders and lights in fingerprint work?