Author Question: If two stars are emitting the same amount of light and are the same size, the star that is farther ... (Read 63 times)

burton19126

  • Hero Member
  • *****
  • Posts: 532
If two stars are emitting the same amount of light and are the same size, the star that is farther will appear
 
  a. brighter.
  b. dimmer.
  c. redder.
  d. bluer.
  e. They will have the same brightness as seen from Earth.

Question 2

The light-gathering power of a telescope is directly proportional to
 
  a. the diameter of the primary mirror or lens.
  b. the focal length of the primary mirror or lens.
  c. the ratio of the focal lengths of its primary mirror or lens and its eyepiece.
  d. the length of the telescope tube.
  e. the diameter of the eyepiece.



l.stuut

  • Sr. Member
  • ****
  • Posts: 345
Answer to Question 1

b

Answer to Question 2

a



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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.

Did you know?

Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.

For a complete list of videos, visit our video library