Exam 4: Light and Telescopes

The angular resolution of the largest single-dish radio telescope in the United States,the 300-ft Green Bank Telescope,is __________ when it operates at a wavelength of 20 cm.

What type of telescope is shown in the image below?

It is possible for light to travel slower than 300,000 km/s.

Calculate the resolution of an interferometric array consisting of five 10-m radio telescopes,each located 1,000 meters apart from each other and observing a distant object at a wavelength of 21 cm.

A prism is able to spread white light out into a spectrum of colors based on the property of:

If the wavelength of a beam of light were to double,how would that affect its frequency?

The light-gathering power of a 4-m telescope is __________ than that of a 2-m telescope.

Using the figure below,list the different types of electromagnetic waves in order of increasing wavelength.

Why do reflecting telescopes usually have a secondary mirror in addition to a primary mirror?

The major advantage CCDs have over other imaging techniques is that:

The light-year is a unit of:

The part of the human eye that acts as the detector is the:

Which of the following lists different types of electromagnetic radiation in order of increasing wavelength?

Using the figure below,list the different types of electromagnetic waves in order of increasing frequency.

The angular resolution of a ground-based telescope is usually set by:

In the past,astronomers have placed telescopes in highflying aircraft in an effort to rise above the water vapor in the Earth's atmosphere.

Explain two major advantages of CCDs over other imaging techniques.

Arrays of radio telescopes can produce much better resolution than single-dish telescopes because they work based on the principle of:

Explain why chromatic aberration is a problem for refracting mirrors but not reflecting mirrors.

The image quality of most optical telescopes is limited by differential atmospheric refraction experienced by light as it passes through the Earth's atmosphere.