WHAT IS LIGHT?
1) Light is
normally defined as the part of the electromagnetic spectrum that
is visible to the human eye.
2) Light travels in a straight light- i.e. it is rectilinear.
3) Light follows the ray model. Originating at a point and
travelling infinitely in one direction until it is interrupted.
4)
Using ray models to study light is called ray optics.
5) Light travels
very fast, 300 million meters per second or 186,000 miles per second.
PHOTOMETRY
Photometry- This is the quantitative study
of light...in other words this is the field of physics in which we measure
and calculate the different values of light. What
is Photometry?
COLOR
The colors of the spectrum
as seen above are called the "spectrum".
There are three
primary colors: RED, BLUE, AND GREEN,
There are three
primary pigments: YELLOW, CYAN, AND MAGENTA
Written by Hal
Repasky @ Seneca Valley Senior High School