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Unformatted text preview: (by what factor) is it than star B? 4. Assume that lightbulbs act as blackbodies. If bulb X gives oﬀ twice as much energy per unit area ( ± = σT 4 ) as bulb Y, but bulb Y has twice the surface area, which has the greater luminosity? 2 5. What are some advantages of having space-based telescopes? Reference a couple diﬀerent regions of the EM spectrum in your response. 6. How can we increase the light-gathering power of a telescope?...
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- Fall '10
- Energy, Black body