Geology Assignment

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Geology

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1. As energy increases, wavelength decreases.

2. Moving toward an observer is compressed/shorter wavelength, which means that it

should shift toward blue.

3. Moving away from an observer results in a stretched/longer wavelength, which means

that it should shift toward red.

4. If a red star is moving toward Earth, the wavelength should get shorter, so the light

spectrum should appear blue shifted.

5. If the star is rotating the same rate as the Earth’s rotation, it would not appear to be

moving toward or away from an observer on Earth, so an observer would not see a red

or blue shift in the EMR emitted from the star.

6. When distance to a galaxy increases, recessional velocity increases.

7. A question I might ask is to understand why the recessional velocity increases as

distance to the galaxy increases.

8. Since recessional velocity is the rate at which the galaxies are moving away from Earth,

if the closer galaxies are moving away faster the line would be opposite of how it looks

in the plot; there would be a negative slope and as distance to a galaxy increased,

recessional velocity would decrease. Below is a sample of the graph would be expected

to look.

9. If the universe were not expanding or contracting, then the recessional velocity would

be constant; the distance to galaxy would not affect the recessional velocity.

Recessional velocity

Distance to Galaxy

Recessional velocity

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1. As energy increases, wavelength decreases. 2. Moving toward an observer is compressed/shorter wavelength, which means that it should shift toward blue. 3. Moving away from an observer results in a stretched/longer wavelength, which means that it should shift toward red. 4. If a red star is moving toward Earth, the wavelength should get shorter, so the light spectrum should appear blue shifted. 5. If the star is rotating the same rate as the Earth’s rotation, it would not appear to be moving toward or away from an observer on Earth, so an observer would not see a red or blue shift in the E ...
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