The sources that can give out their own light are "Light Sources" and the same opposite the sources which can not give out their own light are know as Non Light Sources .
A flourescent light or the sun ( There are many more)
Argon is used in light bulbs and many sources of light
two coherent light sources are produced by splitting a single light source
Coherent sources are sources of light with a constant phase difference. The conditions for this are that there is a constant phase difference and that the light is of the same wavelength.
Many things are considered sources of light. A fire, lamp, and the sun are the main sources of light.
well i would tell you but i don't know the answer too bad too sad.
We are not sources of light so we do not give off light.Light is given off by sources such as the Sun and Stars.Things that are not light sources reflect light into our eyes so we can see them.
The two sources of white light are: *visible light *The Sun.
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Two sources of light energy include the sun and incandescent light bulbs.
There are natural and artificial light sources. A few examples of natural light sources include the Sun, stars, and candles. A few examples of artificial light sources include light bulbs, lamp posts, and televisions.
Coherent sources are sources of light with a constant phase difference. The conditions for this are that there is a constant phase difference and that the light is of the same wavelength.
Competing light sources.
A secondary source is one that pulls from primary sources. Primary sources are direct reporting or accounts of historical events from those who witnessed them, and secondary sources analyze and summarize those.
This is a list of sources of light, including both natural and artificial sources, and both processes and devices.A typical "light source" emits a certain kind of electromagnetic radiation in the visible spectrum. See also List of reflected light sources i panget ang bumasa nito
We need sources to know about our ancestors,How they lived,What clothes did they wear or they did not wear clothes,What were the beliefs of early man and many more.......... So,in simple and short ,we need sources to know about what happened million years ago....