When light reflects off a smooth surface we refer to this as specular reflection.
Alternate light source fingerprint.
Forensic light sources are high power.
Uv alternate light sources can reveal the following.
When light reflects off a rough surface we refer to it as diffused reflection.
All examples below are using the crimescope cs 16 500w.
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Although blood does not fluoresce certain other physiological fluids will.
Available in several styles with or without removable heads rechargeable and battery operated.
If we are fortunate enough that the print is on a smooth surface we start by holding the light source at a 45 degree angle.
Red green orange pink yellow gold blue are the most common.
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Other uses of alternate light sources indeed many forms of physical evidence will fluoresce.
Finger and palm prints are nearly invisible on such metal surfaces when examined under room light.
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Physiological fluids semen urine and saliva can be identified through their natural fluorescent properties utilizing uv light.
Seminal fluid saliva and urine stains.
Leds are lowest in price but also lowest in power and they lack versatility.
They are available in various colors.
Let s go back to the example of the bloody fingerprint.
But when viewed under a green light and observed through an orange filter the prints can easily be seen.
Laboratory lasers are high power but also have the highest price and they lack versatility.
Of all the classes of alternate light sources.
One use for alternate light sources is the examination of a weapon such as a gun or knife.
Alternate light sources alternate light sources are typically used in crime scene investigation to identify many forms of evidence.