Exam 6: Light and Telescopes

Explain the difference between cosmic rays and electromagnetic radiation, and how cosmic particles are captured.

Refracting telescopes use a mirror to gather and focus light.

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

What are the three factors which can limit the resolving power of a telescope?

Which telescope is the largest refracting telescope in the world?

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

Where would you most likely find a large radio telescope?

Why do large reflecting telescopes, like the Keck Observatories, have segmented mirrors?

Which form of electromagnetic radiation is able to easily reach Earth's surface through an atmospheric window?

If telescope A is 160 cm in diameter, and telescope B is 32 cm in diameter, how much more light does telescope A gather than telescope B?

Light-gathering power is proportional to the _______________ of a telescope's primary lens or mirror.

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.

CCD images captured from telescopes are often ____ to be stored in a computer's memory for later analysis.

What unit is used to measure wavelengths?

What does chromatic aberration separate within refracting telescopes?

Light-gathering power and resolving power both depend on what characteristic of a telescope?

What characteristic of a telescope controls the amount of light captured by the telescope?

The Very Large Array radio telescope in New Mexico is an example of the use of which astronomical technique?

A lens called the _______________ is typically used to magnify the image and make it convenient to view distant objects.

Red light of the visible light spectrum has longer wavelengths than blue.