1) For a star that is moving away from the Earth, a) the spectral lines of...
1) For a star that is moving away from the Earth,
| a) the spectral lines of the star are much narrower than the spectral lines of an identical star that is not moving towards or away from the earth. |
| b) the spectral lines of the star are shifted towards the blue end of the spectrum compared to an identical star that is not moving towards or away from the earth. |
| c) the spectral lines of the star are shifted towards the red end of the spectrum compared to an identical star that is not moving towards or away from the earth. |
| d) the spectral lines of the star are at the same wavelengths compared to an identical star that is not moving towards or away from the earth. |
2) Which of the following is the best reason for putting a telescope into orbit around the Earth? Telescopes in orbit around the Earth
| a) are always closer to the stars they are observing compared to telescopes on Earth. |
| b) have longer lifetimes than telescopes on Earth. |
| c) can observe using the full range of the electromagnetic spectrum. |
| d) are moving at speeds closer to the speeds of stars so it is easier to keep the telescope pointed at the desired star compared to telescopes on Earth. |
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1) For a star that is moving away from the Earth,
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