Find the minimum telescope aperture t
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Gievn :
- Angular diamter= 0.35arcsec
- Wavelength = 520nm
To find:
- Minimum telescope aperture
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- Astronauts observing from a space station need a telescope with a resolving power of 0.5 arc second at a wavelength of 570 nm and a magnifying power of 280. 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.)If a telescope is 10 times bigger in diameter it will gather _________ times more light than a smaller telescopeThese images show one of the large `VLT’ telescopes at the European Southern Observatory’s facility at Cerro Paranal, Chile. The place where the laser beam comes out (seen in the inset photo) is just out of sight off of the top edge of the large photo. Also note that if you look down the telescope tube (in the main photo), you can see the tube’s front-end structure. (T/F) judging from the design and components of this telescope, it is a large refracting telescope. True or False ?
- What is the angular resolution limit (degrees) set by diffraction for the 224-cmcm mirror diameter telescope (λλ=560 nmnm)?Geostationary satellites cannot be seen in a telescope from Albany because they are always directly over the Equator. True FalseWhat is bandwidth in an optical instrument? How does it relate to resolution and noise in an optical instrument?
- Two stars are separated by 1 x 10" m and are 4 light years away. Calculate the resolving power of the Hubble Space Telescope, with a diameter of 2.4m, at this distance. Can the Hubble Space Telescope resolve the two stars? Assume the wavelength of light is 650nm. (Hint: Look up the conversion of light years to meters.)Compare the light-gathering power of a 10 m Keck telescope with that of a 0.9 m telescope.Suppose you want a telescope that would allow you to see distinguishing features as small as 6.5 km on the Moon some 384,000 km away. Assume an average wavelength of 550 nm for the light received. What is the minimum diameter of the mirror (in centimeters) that you could use in the telescope?