The oldest pulsars are billions of years old
a. True
b. False
Indicate whether the statement is true or false
False
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Which of the following telescopes benefits most from adaptive optics?
A) the Keck I telescope on Mauna Kea B) the Hubble Space telescope C) the Arecibo radio telescope in Puerto Rico D) the Chandra X-ray Observatory
A(n) ____________________ is the distance that light would travel in one year?
Fill in the blank(s) with correct word
The effects of scaling are beneficial to small creatures
A) that get wet. B) that fall from great heights. C) who are hungry. D) all of the above E) none of the above
When you look at a single slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the width of the slit is decreased,
a. the pattern shrinks in size. (central maximum less wide; other maxima in closer to it) b. the pattern increases in size. (central maximum wider; other maxima farther from it) c. it does not affect the size of the pattern. d. the width of the central maximum increases, but the other maxima do not change in position or width. e. the width of the central maximum decreases, but the other maxima do not change in position or width.