This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: ________ optics deform the shape of the mirror to compensate for the turbulence in the atmosphere ... (Read 138 times)

Tazate

  • Hero Member
  • *****
  • Posts: 532
on: Jul 27, 2018
________ optics deform the shape of the mirror to compensate for the turbulence in the atmosphere and yield a close to diffraction-limited image.
 
  A) Collimating B) Parabolic C) Adaptive D) Coherent E) CCD

Question 2

The longer the period of pulsation for a Cepheid, the more massive and luminous the variable giant star is.
 
  Indicate whether the statement is true or false


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Expo

  • Sr. Member
  • ****
  • Posts: 351
Reply #1 on: Jul 27, 2018
Answer to Question 1

C

Answer to Question 2

TRUE


Tazate

  • Hero Member
  • *****
  • Posts: 532
Reply #2 on: Jul 27, 2018
Thanks


Expo

  • Sr. Member
  • ****
  • Posts: 351
Reply #3 on: Jul 27, 2018
Welcome :)


« previous next »
 

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Did you know?

The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Water potentials decrease (become more negative) as one moves from soil to plant to atmosphere Water potentials decrease (become more negative) as one moves from soil to plant to atmosphere
Skull of an Oriental giant squirrel (genus Ratufa) - note the classic sciuromorphous shape of the an Skull of an Oriental giant squirrel (genus Ratufa) - note the classic sciuromorphous shape of the an
Iron in the Sun’s Atmosphere Iron in the Sun’s Atmosphere
Mirror Mirror
Pressure is a result of the atmosphere’s mass. Pressure is a result of the atmosphere’s mass.
The atmosphere and weather The atmosphere and weather
Video: Dissociative Disorders (Part 2)

For a complete list of videos, visit our video library