ASTR 1000|126 QUESTIONS WITH COMPLETE SOLUTIONS|2024

A convex lens is thinnest in its center; it refracts light to a focus, while a convex mirror reflects it to the focus instead. T/F - ️️False A lunar eclipse can only happen during a: - ️️Full Moon A mountain top is an especially good site for infrared telescopes since: there you are closer to celestial objects. -you are above most of the carbon dioxide and water vapor in the atmosphere. -the cold weather helps the sensitivity of infrared detectors. -less air above means better seeing in many cases. -All of the above are factors. - ️️All of the above are factors A planet (or comet) will slow down as it approaches the Sun. T/F - ️️False A planet's sidereal orbital period can be measured from repeated observtions of its location in the sky (so long as Earth's own motion around the Sun is properly taken into account. T/F - ️️True A region where a denser basaltic plate is subducted under a continental one is: - ️️the Nazca Trench. A solar eclipse can only happen during a: - ️️New Moon A sunbather on the clear day is receiving about 500 watts of solar power. T/F - ️️True A year is defined as: - ️️The time it takes for the earth to complete an orbit around the Sun About what percent of all asteroids are C-type asteroids? - ️️10% All of the jovian planets rotate more rapidly than any of the terrestrial planets. T/F - ️️True All wavelengths of light travel at the same speed in a vacuum, and carry the same energy per photon. T/F - ️️False Almost all we know about Mercury has come from: - ️️the three flybys of Mariner 10.