Why is magnifying power the least important of the three powers of a telescope?
What will be an ideal response?
Because the amount of detail that a telescope can discern is limited generally either by its resolving power or the seeing conditions, very high magnification does not necessarily show more detail. A telescope's power is in its diameter, not its magnification, which can be adjusted by changing out an eyepiece.
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Which moon of the Jovian planets has a thick, hazy atmosphere?
a. Io b. Triton c. Europa d. Titan
If there is a high tide at noon, about when can you expect the next low tide?
A. around 9 PM B. at about midnight C. at about 3 PM D. at about 6 PM
Observations of radio waves from astronomical objects suffer from poorer resolution than visible observations with the same size dish (or mirror) because
a. the signals are so weak in the radio region. b. the wavelength of radio waves is much longer than the wavelengths of visible light. c. radio telescopes are generally much smaller in diameter than optical telescopes. d. it is very difficult to detect radio waves. e. radio telescopes don't use solid mirrors.
What is the maximum efficiency of an engine operating between 500 K and 300 K?
A) 20% B) 30% C) 40% D) 50% E) 60%