17 Questions
What was discovered in the 1970's regarding the use of lasers?
Illuminating certain items with lasers would cause them to fluoresce or stand out in contrast
What is an Alternative Light Source (ALS)?
A type of forensic light source that uses a variety of band pass filters to provide a high intensity beam of non-coherent light
What is a Forensic Light Source (FLS)?
An inexpensive light source that filters white light to enable the search for latent fingerprints on rough surfaces
What is the relationship between lasers and coherent light?
Coherent light is a type of laser light
Which of the following is NOT a type of forensic light source mentioned in the text?
Ultraviolet lamp
What is the process called when an object converts one wavelength of radiant energy to another wavelength?
Luminescence
What is the difference between fluorescence and phosphorescence?
Fluorescence only occurs when the energy source is present, while phosphorescence continues after the energy source is removed.
What is the range of wavelengths that our eyes perceive as white light?
400-700 nanometers
What happens when a narrow beam of white light is passed through a prism?
The light bends and spreads out into the visible spectrum of colors.
What is the key difference between the subtractive and additive color systems?
Subtractive color uses pigments, while additive color uses light.
Which color system describes how we see color in paints?
Subtractive color system
Which of the following is NOT an artificial source of continuous radiation?
Sunlight
What is a key advantage of using a short duration (flash unit) light source?
It is lightweight and battery-powered.
Which type of ultraviolet (UV) lamp is used for sterilizing air and work areas?
Short wave UV
What does the acronym 'LASER' stand for?
Light through Simulated Radiation
Which type of ultraviolet (UV) lamp is commonly used for chemical analysis and industrial applications?
Medium wave UV
In a cloudy and dull environment, what is the visibility of distant objects like?
Limited visibility
This quiz covers the sources of light, specifically focusing on artificial sources including continuous radiation sources like fluorescent lamps and short duration sources like flash units. Test your knowledge on different man-made light sources and their characteristics.
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