two reflecting telescopes have the same angular resolution, but one of them uses visible light and other uses infrared. Which telescope must have the larger primary mirror? visible light telescope or infrared telescope?
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two reflecting telescopes have the same angular resolution, but one of them uses visible light and other uses infrared. Which telescope must have the larger primary mirror? visible light telescope or infrared telescope?
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- 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. (State the necessary primary diameter of the telescope, in m, and the ratio of the focal lengths below.) 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.)Which of these statements best explains why a telescope enables us to see details of a distant object such as the Moon or a planet more clearly? The image formed by the telescope is larger than the object. The image formed by the telescope extends a larger angle at the eye than the object does. The telescope can also collect radio waves that sharpen the visual imageAssess the weaknesses of reflecting and refracting telescopes to determine which is the better choice. Include at least two weaknesses of each.
- If a telescope is 10 times bigger in diameter it will gather _________ times more light than a smaller telescopeGeostationary satellites cannot be seen in a telescope from Albany because they are always directly over the Equator. True FalseInstead of a dot, sometimes the telescope image of a star looks like concentric rings. This is due to: a)diffraction. b)reflection. c)refraction. d)scatter.
- You observe two objects with the same telescope. The telescope is only able to gather visible light. The light you observe from object A has a longer wavelength than the light you observe from object B. Based on this information, which of the following statments MUST be true Light is being reflected from object A Light observed from object B is bluer Light observed from object A is redder Light is being reflected from object B Light is being scattered from object BCompare the light-gathering power of a 10 m Keck telescope with that of a 0.9 m telescope.What is the limit of angular resolution for a 6.3-m telescope at a wavelength of 533nm?