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What is Light?
Light is a form of energy that is
visible to the human eye . The nature of light exhibits the
behavior of transverse electromagnetic waves as well as of charged
particles called photons. Light travels at the speed of 300,000
kilometers per second which to human kind is the fastest traveling
energy form in the universe. At this speed it would take light a mere
one tenth of a second to circumvent the globe.
There are many sources of light energy--> ex. The sun produces solar
energy which is used in solar panels to generate electricity. The light
from the sun is also used in the process of photosynthesis by plants.
Light is produced by one of the two methods called "Incandescence"
and " Luminescence."
Light has it's intensity that corresponds to the power density of a
light wave. Light also has color that corresponds to different
frequencies of light waves. An example of this would be a red colored
light would have a different frequency from green colored light.
Let's find out what properties of light prove its behavior as an
electromagnetic wave and as a particle (Photons)!
Incandescence
is the emission of light from hot matter. Luminescence is the emission
of light when the excited electrons fall to the lower energy levels.
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