Exam 6: Light and Telescopes

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

Why are X-rays and gamma rays considered dangerous forms of light?

Built in 1963, the _______________ telescope in Puerto Rico is the largest single radio dish in the world.

Why is magnifying power the least important of the three powers of a telescope?

All large astronomical telescopes built since the start of the 20th century have been _______________ telescopes.

The ____ of a radio telescope collects and focuses radiation.

Which telescope will be launched into solar orbit and eventually replace observations made by the Hubble Space Telescope?

What telescope instrument is used to counter the eastward rotation of Earth?

Why are reflecting telescopes cheaper to build than refracting telescopes?

What is a spectrograph and why is it considered an astronomer's most powerful instrument?

Radio telescopes are often located near populated areas.

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

Short-focal-length lenses and mirrors must be strongly curved.

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

Name all the forms of radiation within the electromagnetic spectrum in the order from shortest to longest wavelength.

The larger the diameter of a telescope, the more light it will collect.

What is a major selecting factor for astronomers looking to place a telescope atop a mountain?

Cosmic rays are made of photons.

Which type of focus is most common for larger telescopes?

What does a refracting telescope use to gather and focus light?