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Study Quizzes

Please read each question and select your answer from the choices provided. You must complete all of the questions in order to view your results. At the end of each exam, you have the option to e-mail your results to your instructor.


1:  The magnification of a telescope that has an objective of 200-centimeters focal length and an eyepiece of 5-centimeters focal length is
A: 40.
B: 200.
C: 2.
D: 1000.
E: (We do not have enough information to answer the question.)

2:  The diameter of the objective of telescope X is twice the diameter of the objective of telescope Y. For the same wavelength, which of the following statements is correct?
A: Telescope Y is better at seeing details.
B: Telescope Y has a resolving power that is two times that of telescope X.
C: Telescope X has a resolving power that is two times that of telescope Y.
D: Both telescopes have the same resolving power.
E: In order to decide on which telescope is better at seeing details we need to know the wavelength used.

3:  Two identical radio dishes, 10 kilometers apart, are connected and used as an interferometer. The diameter of each dish is 50 meters. Which of the following is correct in describing the resulting telescope?
A: It has the resolution of a 50-meter telescope and the light-gathering power of a 70-meter telescope.
B: It has the resolution of a 50-meter telescope and the light-gathering power of a 50-meter telescope.
C: It has the resolution of a 10-kilometer telescope and the light-gathering power of a 100-meter telescope.
D: It has the resolution of a 10-kilometer telescope and the light-gathering power of a 50-meter telescope.
E: It has the resolution of a 10-kilometer telescope and the light-gathering power of a 70-meter telescope.

4:  Astronomers increasingly use CCDs instead of photographic film because
A: CCDs are more efficient detectors of light.
B: data collected by CCDs consist of numbers, which makes data analysis easier.
C: CCDs can differentiate between objects of different intensities viewed simultaneously.
D: CCDs have a linear response.
E: (All of the above.)

5:  In the coude' design, light reflects _____ times before it exits the telescope on its way to the focal point.
A: 1
B: 2
C: 3
D: 4
E: (None of the above.)

6:  Light refracts as it passes through a wedge of glass. This is a result of the fact that the speed of light in glass is
A: the same as in air.
B: smaller than that in air.
C: greater than that in air.
D: continuously changing along its path.
E: (None of the above.)

7:  Which of the following telescopes can be used only above the Earth's atmosphere?
A: a reflecting telescope
B: a refracting telescope
C: an optical telescope
D: an X-ray telescope
E: a radio telescope

8:  A 50-meter radio telescope operating at a wavelength of 1 meter has a resolution of about
A: 1 degree.
B: 1.4 degrees.
C: 1.4 arcseconds.
D: 5000 degrees.
E: 5000 arcminutes

9:  Refraction of light is best demonstrated by
A: the formation of an image by a mirror.
B: interference patterns.
C: the bending of light as it goes through a hole in a wall.
D: the apparent bending of a pencil in a glass of water.
E: (None of the above.)

10:  The focal lens of a lens
A: is the distance from the lens to the image formed when the object is very far from the lens.
B: depends on the wavelength of light used.
C: is the same as its magnification.
D: is the largest distance an object can be from the lens for which the lens can form a clear image.
E: (Both A and B.)

Optional: Enter your name and your instructor's E-mail address to have your results E-mailed to him or her.
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