Chemistry help for my niece please
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Chemistry help for my niece please

[From: ] [author: ] [Date: 11-12-29] [Hit: ]
When you look at a dull black object, none of the colors of sunlight light are traveling from the object to your eyes.White clothes keep you cooler, because the electrons in the atoms of the chemical dye are absorbing the energy. When you look at a white object, all of the colors of the sunlight are traveling from the object to your eyes.......

I call this CHEMISTRY FUN AT A CAMPFIRE!

One more point!

Sunlight has all the colors of the rainbow. As the energy of the sunlight is absorbed by the atoms of the dye in a red shirt, some of energy is absorbed by the electrons as described above. When you look at a red shirt, a light wave with frequency of 4.42 * 10^14 Hz is traveling from the shirt to your eyes. The rest of energy of the sunlight causes the atoms to vibrate at a higher velocity. Temperature measures the average kinetic energy of the atoms. So, the rest of energy of the sunlight causes the temperature of the shirt to increase.

Black clothes get very hot, because the electrons in the atoms of the chemical dye are not absorbing the energy. When you look at a dull black object, none of the colors of sunlight light are traveling from the object to your eyes.

White clothes keep you cooler, because the electrons in the atoms of the chemical dye are absorbing the energy. When you look at a white object, all of the colors of the sunlight are traveling from the object to your eyes.

Everything that you see is the product of the electrons absorbing and emitting energy.

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Even though it's Wikipedia, this article explains it quite well: http://en.m.wikipedia.org/wiki/Emission_spectrum
Each element is different. A spectroscope is a useful tool used to identify elements. It, naturally, has other uses too.

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each has a unique number of electrons and therefore a unique amount of energy is released when heated.

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The electrons in an atom can be arranged so they are in the lowest possible energy arrangement.
This is called its ground state.
When the atom is heated some of the electrons are forced into higher energy levels.
This is called an excited state.

The excited electrons release the extra energy and return to a lower energy state.
The energy may be in the infrared, visible, ultraviolet, or other parts of the spectrum.
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