ASTRONOMY CH 6 QUIZ

Match each telescope or observatory to the region of the electromagnetic spectrum it was designed to observe. 1. Spitzer Space Telescope 2. Chandra Observatory 3. Hobby-Eberly Telescope 4. Arecibo Observatory

1. Infrared 2. X-ray 3. Visible with some infrared 4. Radio

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

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 to represent something about the X-rays recorded by the telescope

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

Most modern 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

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

The size of a distant galaxy

The Hubble Space telescope obtains higher resolution images than most ground-based telescopes because it is:

above the atmosphere