Exam 6: Telescopes: Portals of Discovery

A) to improve the angular resolution of telescopes in space
B) to eliminate the distorting effects of atmospheric turbulence for telescopes on the ground
C) to increase the collecting area of telescopes on the ground
D) to increase the magnification of telescopes on the ground
E) to allow several small telescopes to work together like a single larger telescope

Correct Answer

verified

Show Answer

A) The 8-meter telescope has 16 times the light-collecting area of the 2-meter telescope.
B) The 8-meter telescope has 4 times the light-collecting area of the 2-meter telescope.
C) The 8-meter telescope has 8 times the light-collecting area of the 2-meter telescope.
D) The answer cannot be determined from the information given in the question.

Correct Answer

verified

Show Answer

A) high angular resolution
B) high turbulence
C) a radio telescope
D) high spectral resolution

Correct Answer

verified

Show Answer

A) It is the maximum size to which any telescope can be built.
B) It describes the farthest distance to which the telescope can see.
C) It describes the maximum exposure time for images captured with the telescope.
D) It is the best angular resolution the telescope could achieve with perfect optical quality and in the absence of atmospheric distortion.

Correct Answer

verified

Show Answer

A) radio,visible,and very limited portions of the infrared and ultraviolet regions
B) all light with wavelengths longer than ultraviolet wavelengths
C) all light with wavelengths shorter than infrared wavelengths
D) infrared,visible,and ultraviolet light

Correct Answer

verified

Show Answer

Correct Answer

verified

It would be worse than 0.01 ar...

View Answer

Show Answer

A) radio
B) infrared
C) optical
D) ultraviolet
E) X-ray

Correct Answer

verified

Show Answer

A) Getting an image of the same angular resolution requires a much larger telescope for radio waves than for visible light.
B) Radio telescopes are designed to collect sound rather than light.
C) It is because radio telescopes are used in the daytime and visible light telescopes are used at night.
D) Objects that emit radio waves are always much larger than objects that emit visible light,and therefore require larger telescopes.

Correct Answer

verified

Show Answer

A) a point of light in Earth's atmosphere created by a laser for the purpose of monitoring atmospheric fluctuations
B) a satellite orbiting Earth
C) a meteor
D) a possible source of dark matter in the universe
E) the unseen member of a binary star system

Correct Answer

verified

Show Answer

A) eye,photographic film,CCD
B) photographic film,CCD,eye
C) CCD,eye,photographic film
D) CCD,photographic film,eye
E) eye,CCD,photographic film

Correct Answer

verified

Show Answer

A) CCDs allow long exposures (e.g. ,minutes or hours) ,and film does not.
B) CCDs can record the colors of astronomical objects accurately,while film cannot.
C) CCDs capture a much higher percentage of the incoming photons than does film.
D) Images recorded with CCDs never require any image processing,while images recorded by film often do.
E) CCDs can be attached to modern telescopes more easily than cameras.

Correct Answer

verified

Show Answer

A) It describes the farthest distance to which the telescope can see.
B) It is the angular resolution the telescope could achieve if nothing besides the size of its light-collecting area affected the quality of its images.
C) It is the maximum size to which any telescope can be built.
D) It describes the maximum exposure time for images captured with the telescope.

Correct Answer

verified

Show Answer

Correct Answer

verified

Answers will vary somewhat with location...

View Answer

Show Answer

A) The Keck I Telescope on Mauna Kea.
B) The Hubble Space Telescope.
C) The Arecibo Radio Telescope in Puerto Rico.
D) The Chandra X-Ray Observatory.

Correct Answer

verified

Show Answer

A) It reduces blurring caused by atmospheric turbulence for telescopes on the ground.
B) It allows several small telescopes to work together like a single larger telescope.
C) It is a special technology that allows the Hubble Space Telescope to adapt to study many different types of astronomical objects.
D) It allows ground-based telescopes to observe ultraviolet light that normally does not penetrate the atmosphere.

Correct Answer

verified

Show Answer

A) 1 m.
B) 2 m.
C) 5 m.
D) 10 m.
E) 100 m.

Correct Answer

verified

Show Answer

Correct Answer

verified

Interferometers are groups of telescopes...

View Answer

Show Answer

A) A refracting telescope uses a transparent glass lens to focus light while a reflecting telescope uses a mirror to focus light.
B) A refracting telescope produces refracted images while a reflecting telescope produces reflected images.
C) Reflecting telescopes make much clearer images than can refracting telescopes of the same size.
D) It is much easier to make a large refracting telescope than a large reflecting telescope.

Correct Answer

verified

Show Answer