ASTR Chap 6

Suppose the angular separation of two stars is smaller than the angular resolution of your eyes. How will the stars appear to your eyes?

What do astronomers mean by light pollution?

What causes stars to twinkle?

What is the purpose of adaptive optics?

Which of the following is not an advantage of the Hubble Space Telescope over ground-based telescopes?

Which of the following wavelength regions cannot be studied with telescopes on the ground?

Telescopes operating at this wavelength must be cooled to observe faint astronomical objects.

In what part of the electromagnetic spectrum do the biggest telescopes on Earth operate?

What does the technique of interferometry allow?

What are the two most important properties of a telescope?

How much more light does an 8-meter telescope gather than a 2-meter telescope?

Suppose that two stars are separated in the sky by 0.01 arcsecond, and you observe them with a telescope that has an angular resolution of 1 arcsecond. What will you see?

A camera is an example of an instrument used for _____________ observations.

______________ refers to telescopic observations in which we separate an object's light so we can measure its intensity at different wavelengths.

If we want to confirm that a star's brightness alternately dims and brightens, we need ______________ observations of the star.

The familiar twinkling of the stars is caused by ___________, which also blurs telescopic images.

Human civilization is responsible for what astronomers call __________________________.

What is the primary reason that we launch X-ray telescopes into space rather than building them on the ground?

Which of the following is always true about images captured with X-ray telescopes?

What is meant by spectral resolution?

Which of the following studies is best suited to a time monitoring experiment?

t/f A radio telescope and an optical telescope of the same size have the same angular resolution.

What does angular resolution measure?

Which of the following statements best describes the difference between a refracting telescope and a reflecting telescope?

Which of the following is always true about images captured with X-ray telescopes?

How much greater is the light-collecting area of a 6-meter telescope than a 3-meter telescope?

t/f Improvements in technology will eventually allow the entire electromagnetic spectrum to be observed from high mountaintop observatories.

t/f X rays from astronomical objects can only be detected from telescopes in space.

Which of the following wavelength regions can be studied with telescopes on the ground?

Which of the following forms of light can be observed with telescopes at sea level?

If our eyes were sensitive only to X rays, the world would appear __________.

If you had only one telescope and wanted to take both visible-light and ultraviolet pictures of stars, where should you locate your telescope?

The James Webb Space Telescope is designed primarily to observe __________.

Where should you put a telescope designed for ultraviolet observations?

The twinkling of stars is caused by:

Which of the following determines the image quality of a telescope?

Compare the light collecting ability of a telescope with an 8 inch diameter primary objective telescope to that of a telescope with a two inch primary objective.

What is meant by refraction of light

What is meant by the resolution of an optical device?

What celestial coordinate tells you how far east or west a celestial object is in the sky?

What celestial coordinate tells you how far north or south the celestial object is located in the sky?