What is the main source of light?

Answer 1

The sun formed several billion years ago from a cloud of gas and dust called a nebula. The cloud was mostly composed of hydrogen along with some helium and small amounts of other elements. The nebula collapsed as a result of gravity and possibly the shock wave from a supernova. Several discrete pockets formed that heated as they collapsed and pressure increased. The heat and pressure eventually ignited nuclear fusion, which released huge amounts of energy, thus forming this sun and several other stars. The fusion in the cores of these stars continues to this day. Some of the heavier material in the nebula clustered together to form planets, comets, and other such objects.

Answer 2

That's a toughie, since you were kind of vague... I'll start by assuming you mean OUR sun, which is a Medium size, Population I (Youngest kind, comprised of a higher metal content than other stars), Yellow Dwarf star about halfway through it's lifetime. * If you meant what is it's source of power, that would be itself. It is made up of mostly Hydrogen and Helium with much smaller amounts of Oxygen, Carbon, Iron, Sulfur, Neon, Nitrogen, Silicon and Magnesium. The core of the sun generates energy by converting Hydrogen to Helium through nuclear fusion. * If you meant where did the sun come from, that would be older stars. According to the Big Bang version of things, everything atarted as a super dense, super hot pinpoint in the middle of nothingness. The first stars created were Population III stars- very large stars that eventually became supernovae and dispersed their contents throughout the universe creating Population II stars. The Population II stars followed suit, and dispersed their contents to the universe again, creating the Population I stars- including our sun (Which itself does not have enough mass to become a supernoma. It will eventually expand to our rotation field and eventually turn into a red dwarf.) That was probably too much information, hopefully it was too much CORRECT information. For more go here: http://en.wikipedia.org/wiki/Formation_and_evolution_of_the_Solar_System

and here

http://en.wikipedia.org/wiki/The_sun

Answer 3

Light. White light is a mixture of various colors; some of them visible for our eyes, some of them not. (In the latter case, instead of "colors" the word "frequency" is usually used, since "color" implies that it is visible.)

Answer 4

Electro-magnetic energy in the form of visible radiation which is usually known as "light" and invisible radiation which is usually known as "heat" and also as "radio waves".

Answer 5

-- the Sun

-- any other star

-- a flashlight

-- a fire

-- a burner on a gas stove

-- a light bulb

-- a meteor

-- a match when it's scratched

-- a firefly

-- fireworks

-- a glow-stick

-- a fluorescent tube when energized

-- lightning

-- the zap when you scuff on the carpet and then touch somebody

-- a flint hitting a rock (or a rock hitting a flint, I'm never sure)

-- an LED

-- a CRT

-- a plasma display

-- a burning candle

Answer 6

-- the sun

-- street lights

-- auto headlights

-- the light in my bathroom

Note: The moon is often useful and important for getting around at night, but

it is not strictly a light "source", and cannot properly be included on this list.

Answer 7

All of the sunlight that shines on the earth, moon, and all of the other planets and moons in the solar system,
comes from the sun.

The light is only a small part of the energy that the sun produces. There is also microwave, infrared,
ultraviolet, and X-ray energy produced in the sun. We're not aware of it in daily life, because we can't
see it. The only energy we're aware of in addition to the light is the heat energy. That comes from
the sun too.

All of this energy is produced by continuous nuclear fusion inside the sun.

The sunlight and other energy that hits the earth is only a tiny part of the energy that the sun produces.
The rest shines in directions that miss the earth.

Answer 8

-- stars

-- fires

-- flashlights

-- fireflies

-- toaster-coils

Note:

Within our solar system, there is only one source of light.

No planet, moon, comet, or asteroid is one.

Answer 9

The source of energy in the sun, and virtually all other stars, is "nuclear fusion".

In the sun, it goes like this: Compress hydrogen under enough pressure and

at a high enough temperature, and the nuclei of hydrogen atoms can "fuse" ...

join together to become nuclei of helium atoms. When they do that, the mass of

the newly formed nucleus is a little less than the mass of the pieces that were

joined to form it. What happened to that missing mass ? It became energy.

How much energy do you get from a little bit of mass ? The equation is simple,

and you've heard it before: E = Mc2 .

How much does that mean ?

It means that one ounce of mass, converted completely into energy, produces

something like 708,000,000 kilowatt hours of energy ... roughly enough to run

a full-sized microwave oven for 48,900 years, or a 200-horsepower motor for 941

years. And the sun converts thousands of tons of mass into energy every second.

That's amazing. It sounds like a great way to get lots of cheap energy. Why don't we

do that on Earth ?

We've been trying for a long time. So far, after more than 60 years of research, there's

still only one device that we've developed enough to consistently and reliably use

nuclear fusion. It's called the "hydrogen bomb".

Answer 10

The source of Light is electricity which also can be used as a lamp to see through dark, the sun or moon. It is something for us to see with