Exam 6: Light and Telescopes

Which telescope is the largest refracting telescope in the world?

Refracting and reflecting telescopes form an image that is small, inverted, and difficult to observe directly; therefore, an eyepiece is normally used to magnify the image and make it convenient to view.

Reflecting telescopes suffer from chromatic aberration because the light must pass through the glass.

The Chandra observatory uses ________________ mirrors in which the X-rays reflect at shallow angles from the polished inside of the mirrors to form images on X-ray detectors.

Space-based telescopes carrying long-wavelength infrared detectors must carry coolant such as liquid helium to chill their optics to near absolute zero temperature.

All telescopes must be operated on site by an astronomer or a technician.

What technique often requires the use of a laser guide star?

Which part of a telescope is responsible for magnifying an image?

Explain interferometry and provide an example of an observatory that uses this technique.