PHYS20-HW3solns - PHYS 20 - Homework 3 Solutions 1. How...

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telescope? (a)two times (b)four times (c)six times (d)three times 2. Suppose that two stars are separated in the sky by 0.1 arcsecond. If you look at them with a telescope that has an angular resolution of 0.5 arcsecond, what will you see? (a)Two distinct stars. (b)One point of light that is the blurred image of both stars. (c)Nothing at all. (d)Two blurred stars. 3. The diffraction limit is a limit on: (a)A telescope's size. (b)A telescope's angular resolution. (c)A telescope's spectral resolution. (d)A telescope's image size. 4. The Hubble Space Telescope obtains higher-resolution images than ground-based telescopes because it is: (a)larger. (b)closer to the stars. (c)above Earth ʼ s atmosphere. (d)better made. 5.The twinkling of stars is caused by: (a)variations in stellar brightness with time. (b)light pollution. (c)motion of air in our atmosphere. (d)defects in the human eye. 6. If you wanted a radio telescope to achieve the same angular resolution as a visible- light telescope, it would need to be: (a)much larger. (b)slightly larger. (c)in space. (d)the same size. 7. Where should you put a telescope designed for ultraviolet observations? (a)in Earth orbit. (b)on an airplane.
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This note was uploaded on 11/17/2011 for the course PHYSICS 20 taught by Professor Mubarek during the Spring '11 term at UC Riverside.

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PHYS20-HW3solns - PHYS 20 - Homework 3 Solutions 1. How...

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