Chapter 1 – Activeforever Quasar MD Plus Advanced Light Therapy Device User Manual
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Chapter 1
1) Visible Light: light that is within the visible spectrum, 400nm (violet) to 700nm
(red)
1. Visible light is light that humans can see and is between 400 and 700 nm
wavelength.
True
False
2) Infrared Light: light in the invisible spectrum below red, from 700nm to
2,000nm
2. Infrared light is between 700 and 2000 nm wavelength and we can see it.
True
False
3) Frequency: number of cycles per second measured in Hertz (Hz).
3. Frequency is measured in Hertz (Hz).
True
False
4) Coherency: wavelengths of light traveling in phase with one another.
4. Coherency is when wavelengths of light are traveling in phase with each other.
Lasers can produce this type of light.
True
False
5) Monochromatic: light that is of one color, or one wavelength.
5. Monochromatic is when there are multiple wavelengths of light.
True
False
6) Collimation: light focused in a beam, maintaining a constant diameter
regardless of its distance from the object or surface directed toward
7) Nanometer (nm): a unit of measure of wavelength of light (one billionth of a
meter)
6. Nanometer is a unit of measure that is used to measure the wavelengths of
light and is one billionth of a meter.
True
False
8) Nanosecond: one billionth of a second
7. Nanosecond is 100 seconds.
True
False
9) Joule (J): unit used to measure the energy delivered