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Astrobae Chap 3 Part 6
Terms in this set (15)
High-energy EM radiation (light)_______ be collected and focused the usual way using ordinary reflecting or refracting telescopes
________ cannot be collected and focused the usual way using ordinary reflecting or refracting telescopes
High-energy EM radiation (light)
To focus the highly energetic x-rays from astronomical sources, astronomers follow the
A set of nested parabolic mirrors necessary to make the grazing technique work
What optical design is usually found in professional observatories?
The Cassegrain design
Radiotelescopes _________ big dishes because radiowaves have long wavelengths
Radiotelescopes must have big dishes because
radiowaves have long wavelengths
Astronomical objects are tracked by means of altitude and azimuth motions of the telescope.
Objects are naturally tracked once the telescope's axis is pointed at the NCP or Polaris.
a telescope with the largest aperture with Newtonian design
the eyepiece located at the top of the instrument
Which mount is usually found in professional observatories?
The alt-azimuth mount
The alt-azimuth mount is usually found in professional observatories because
computer-controlled alt-azimuth mounts make it easier to manipulate heavy telescopes while tracking celestial objects
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