Author Question: A _____ is a piece of glass with thousands of microscopic parallel lines scribed onto its surface to ... (Read 51 times)

casperchen82

  • Hero Member
  • *****
  • Posts: 540
A _____ is a piece of glass with thousands of microscopic parallel lines scribed onto its surface to produce a spectrum.
 
  A) grating
  B) charge-coupled device
  C) photometer
  D) spectrograph

Question 2

The main reason for connecting two or more telescopes in an interferometer is to:
 
  A) observe more objects in a shorter amount of time.
  B) improve resolving power.
  C) enhance seeing.
  D) increase diffraction fringes.



k2629

  • Sr. Member
  • ****
  • Posts: 357
Answer to Question 1

A

Answer to Question 2

B



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Did you know?

In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

For a complete list of videos, visit our video library