Physics Course/Light

Sources of Light
Light comes from difference sources.
 * /Light from Celestial Bodies/.
 * Light from Stars (the Sun), from the Moon (reflection).


 * /Light from Fire/.
 * A chemical reaction between flammable and combustible materials . Example(s): a Candle's Light, a Matches' Light.


 * Light from Electric Discharge
 * Light from thunder.


 * /Light from Biolife/
 * Bioluminesence, a chemical reaction. Example(s): Fireflies, Certain Bacteria


 * /Electromagnetic Radiated Lights/
 * Matter Absorbs Electric Energy until one point in time it no longer absorb Electric Energy instead it converts Electric Energy into Radiated Electromagnetic Light.


 * /Electric Radiated Light/
 * Electric's Conductor when conducts current release Heat and radiate Light.

Characteristics of Light

 * Light travels as a wave at a constant speed C = 3 x 108 m/s in vacuum
 * Light shines on an object will leave objects' image
 * The absorption of Light Energy depend on matter material's Thickness and Color .
 * Thick Clothes are easy to dry under the sun light . Dark Clothes are easy to dry under the sun light


 * Light Wave from different sources travel in the same medium can interfere with each other to produce different kinds of Light's /Interference/ . /No Light/, when light waves interfere constructively . /Bright Light/ when light waves interfere Destructively 
 * Light Wave can be reflected back into the medium that it comes from and could be interfere with other wave lights in the medium to produce Interference 
 * Light Decomposed into Six lights of six colors Red, Orange , Yellow , Green , Blue , Violet when it travels through a crystal medium . For example Rainbow in the sky after the rain . Light passing through /Prism/ 
 * Color of light can be produced from three primaries colors namely Red Green Blue commonly refer to as RGB by mixing them in percentage 
 * Light that the eyes perceive are in the frequency length of that has wavelength 400 - 700 nm 
 * According to Kaluza-Klein Theory, it may be a ripple in a five dimensional space-time fabric

Light and Matter

 * /Light and Glass/
 * /Light and Water/