The thickness of the disk of the Milky Way is about ________ the diameter of the disk.
A) 1/10th of
B) 1/1000th of
C) 1/1,000,000th of
D) the same as
B) 1/1000th of
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The Very Large Array radio telescope in New Mexico is an example of the use of which astronomical technique?
a. spectral analysis b. photometry c. interferometry d. resolving power e. cosmic analysis
Which of the following is not a good reason to place an observatory on a remote mountain to?
A) reduce the impact of light pollution B) reduce the twinkling caused by Earth's atmosphere C) allow study of infrared light D) allow observations at ultraviolet and x-ray wavelengths
Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines. The second-order maximum is seen at 32.5°. What is the wavelength of the incident light?
A) 202 nm B) 403 nm C) 452 nm D) 605 nm E) 806 nm
On our Moon, Mercury, Earth, and Mars, there are a variety of meteor craters in terms of size. Yet all those found on Venus are over 5 kilometers across. Explain
What will be an ideal response?