What is ultraviolet light?
Ultraviolet, or UV for short, is a form of light that is invisible
to humans. UV makes up a small section on the entire spectrum
of light. As shown below, the entire light spectrum also includes
infrared light, X-rays, gamma rays and the visible light we see.
Light is commonly categorized by its wavelength. The light
to the left on the above spectrum has the longest wavelength,
while the light on the right side has the shortest. Ultraviolet
light is just to the left of the color violet in the visual light
Utraviolet literally translates to beyond violet, with ultra
being Latin for beyond or past. Infrared, just on the other side
of the visible light, means beyond or past red, with infra meaning
the same as ultra.
Humans can only see visible light and its colors violet to
red. Human can't see any of the other type of light. The visible
colors have different wavelengths from each other.
Next: The different
kinds of UV light
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