Why does the Sun's image look distorted in shape at sunset?
The distortion arises because of the way air affects the paths of light
Suppose you have a camera attached to a telescope, and you want to record an image of a very faint galaxy. Which of the following will help the most?
A lot of pixels and a long exposure time
Suppose you have two small photographs of the Moon. Although both look the same at small size, when you blow them up to poster size one of them still looks sharp while the other one becomes fuzzy (grainy) looking. Which of the following statements is true?
The one that still looks sharp at large size has better (smaller) angular resolution than the one that looks fuzzy
The angular separation of two stars is .1 arcsecond and you photograph them with a telescope that has an angular resolution of 1 arcsecond. What will you see?
The photo will seem to show only one star rather than two
How does the light-collecting area of an 8-meter telescope compare to that of a 2-meter telescope
The 8-meter telescope has 16 times the light-collecting area of the 2-meter telescope
Which of the following best describes the development of astronomical telescopes over the past 65 years?
The world's most powerful telescope remained the same for most of this period, but in the past 20 years many new and more powerful telescopes have been built