Theoretically (that is, if seeing were not an issue), the resolution of a telescope is inversely proportional to its diameter. How much better is the resolution of the ALMA when operating at its longest baseline than the resolution of the Arecibo telescope?

Compare the light-gathering power of one of the 10-m Keck telescopes with that of a 0.5-m telescope.

Astronauts observing from a space station need a telescope with a resolving power of 0.6 arc second at a wavelength of 530 nm and a magnifying power of 220. Design a telescope to meet their needs.What will its light-gathering power be, compared with a dark-adapted human eye? (Assume that the pupil of your eye can open to a diameter of about 0.8 cm in dark conditions.)(State the necessary primary diameter of the telescope, in m, and the ratio of the focal lengths below.)

Geostationary satellites cannot be seen in a telescope from Albany because they are always directly over the Equator. True False

Compare the light-gathering power of a 10 m Keck telescope with that of a 0.9 m telescope.

Why is it that radio telescopes need to be so larger or organized in arrays?