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Unformatted text preview: iClicker Questions Discovering the Universe, Eighth Edition by Neil F. Comins and William J. Kaufmann III Chapter 12 12-1. Protostars are not seen in visible light telescopes because: a) they dont emit any radiation b) they are surrounded by clouds of gas and dust * c) they only emit infrared radiation d) they are all moving away from Earth so fast that their visible light is Doppler shifted into the infrared 12-2. A brown dwarf is best described as: a) a low mass object that doesnt fuse in its core * b) a low mass main sequence star c) a high mass main sequence star 12-3. Why are A-type main sequence stars hotter than G-type main sequence stars? a) A-type stars have cores of metal, whereas G-type stars do not b) A-type stars have more fusion on their surface than G-type stars c) A-type stars have more fusion in their cores than G-type stars * d) A-type stars fuse in their cores and near their surfaces, while G-type stars only fuse in their cores....
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This note was uploaded on 03/22/2012 for the course FINA 210 taught by Professor Dakroub during the Spring '12 term at American University in Cairo.
- Spring '12