The SST's planned operating temperature is 5.5 K. At what wavelength (in micrometers, μm) does the telescope's own blackbody emission peak? How does this wavelength compare with the wavelength range in which the telescope is designed to operate?
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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.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 FalseFor a human eye with a pupil diameter (aperture diameter D) of 0.005 meters, and a focal length of 0.022 meters, there will be a resolution limit due to diffraction at 0.6 microns (10^-6 meters) wavelength. If we space light-sensitive cells on the retina at this spacing, how many retina cells per meter (of retina) are there? cells/meter. Now suppose there are giants which are exactly twice the size of humans in each dimension. So giant eyes have pupils of 0.01 meters, and a focal length of 0.044 meters. How many retina cells per meter should the giants have? cells/meter
- 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 BWhich of the following is NOT a characteristic of the next generation of planned telescopes? Answers: A. multiple focus points B. extreme size C. segmented mirrors D. adaptive optics E. multiple wavebandsCalculate the angular resolution of radio interferometer with a base line of 10000 km and an operating wavelength of 0.1 m.