Chapter 6 Quiz

Currently, the largest optical telescope mirrors have a diameter of

10 m

Prime focus, Newtonian focus, and Cassegrain focus are

All examples of reflector telescopes

Which of the following could not be determined by an observation that uses only spectroscopy?

the size of a distant galaxy

What type of telescope is the hobby eberly telescope?

Infrared

What type of telescope is the spitzer space telescope?

Infrared

If you wanted a radio telescope to achieve the same angular resolution as a visible-light telescope, it would need to be

Much larger

Why do astronomers need different telescope designs to observe across the electromagnetic spectrum?

Photons of different energy behave differently and require different collection strategies.

What type of observatory is the Arecibo observatory?

Radio

Most modern large telescopes are

Reflectors

Why can modern ground based reflector telescopes be so large?

Technology has advanced to the level that active control can adjust thin mirrors to keep objects in focus

Which of the following statements best describes the two principal advantages of telescopes over eyes?

Telescopes can collect far more light with far better angular resolution.

What type of observatory is the Chandra Observatory?

X-ray

The Hubble Space Telescope obtains higher resolution images than most ground based telescopes because it is

above the atmosphere

If you see the color red in an X-ray image from the Chandra X-Ray Observatory, it means:

it depends: the colors are chosen arbitrarily to represent something about the X rays recorded by the telescope.