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

Author Question: Why is a complete image formed even if half of a lens or mirror is blocked? What will be an ideal ... (Read 22 times)

Davideckstein7

  • Hero Member
  • *****
  • Posts: 555
on: Jul 27, 2018
Why is a complete image formed even if half of a lens or mirror is blocked?
 
  What will be an ideal response?

Question 2

Explain as exactly as possible the way in which the central engine of active galaxies and quasars actually works. Why is the orientation so important?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

maya.nigrin17@yahoo.com

  • Sr. Member
  • ****
  • Posts: 324
Reply #1 on: Jul 27, 2018
Answer to Question 1

While the image formed is only half as bright, each part of the objective sees and images the entire object.

Answer to Question 2

Matter from an accretion disk falls into a supermassive black hole. As it does so, it accelerates and emits energy. About 20 of the energy from the mass falling in (from mass-energy conversion, E = mc2 ) is radiated off. This energy may escape, or be absorbed by outer layers and re-radiated, or sent off as high-energy jets which give rise to radio lobes. What we see from Earth depends greatly on whether we see it from the side as radio lobes, or from the top as a blazar.


Davideckstein7

  • Member
  • Posts: 555
Reply 2 on: Jul 27, 2018
YES! Correct, THANKS for helping me on my review

scottmt

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Great answer, keep it coming :)

« previous next »
 

Did you know?

Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Complete Menstrual Cycle Complete Menstrual Cycle
Lens Lens
(a) Initial mtDNA results suggested modern humans and Neadertals were equally distantly related to D (a) Initial mtDNA results suggested modern humans and Neadertals were equally distantly related to D
Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent Chinese workers on a railway in the far West. “Without them,” Leland Stanford, president of the Cent
Eating Disorders and Body Image Eating Disorders and Body Image
complete combustion complete combustion
Video: Muscle cell structures - actin, myosin and titin filaments

For a complete list of videos, visit our video library