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Answer:
1.THE SUN
COMMON SOURCES OF LIGHTSources of light are things or devices that produce light, and the two general sources are natural and artificial. The sun is Earth's main source of natural light that releases its energy as heat and light. This light is known as white light, and it is what gives Earth daylight.
2.The electrons are being steadily pushed by the external energy from the electrical outlet and transfer energy to the tungsten atoms through collisions. Hot objects glow and give off light, just as the coils of a toaster glow red, or the wood and coals of a fire give off light.
3.Light has the properties of waves. Like ocean waves, light waves have crests and troughs. The distance between one crest and the next, which is the same as the distance between one trough and the next, is called the wavelength.
Explanation:
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