Conclusion:
1.) A spectrum is like an element's fingerprint, because each element releases a different emission spectrum. Since elements have different elecrtron configurations, when an atom of an element goes from the excited state back to the ground state, its light emission spectrum will be different from any other. Just as fingerprints are used for identification purposes, as can an emission spectrum. Since all light spectra are different, depending on the element, a spectrum can be used to determine which element is releasing it.
2.) A spectrum is formed when an atom is going from the excited, back into the ground state. This is because the energy that was once absorbed, now needs to be released, in the form of light energy. This process is happening so rapidly, that when we see light, it appears to be a constant, when really it is this individual process happening to millions of atoms, happening millions of times.
Enrichment:
1.) Jules Janssen was the man that discovered Helium. He gave the element the name Heliom after the Greek God, Helius, because he discovered it during a solar eclipse.
2a.) Blue and red shifts are the shifts of wavelengths toward one side of the color spectrum, thus making it appear more red or more blue, and also making the wavelength shorter or longer, depending on which shift has occurred.
2b.) Red shift galaxies are much more abundant than blue shift galaxies. Since a blueshift is a decrease in wavelength (an increase in frequency), it will increase the velocity of particles. This increase in particles creates the doppler effect, because as the universe is expanding, the frequency will appear to increase even more. Theoretically, the two are directly connected.
2c.) Edwin Hubble was an American astronomer, for whom the Hubble Telescope was named. His advances in theoretical Physics, and astronomy helped create a better understanding for many theorys relatesd to redshift, blueshift, and the expanding universe.
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