« previous next »

Author Question: If two stars are emitting the same amount of light and are the same size, the star that is farther ... (Read 58 times)

burton19126

  • Hero Member
  • *****
  • Posts: 532
on: Jul 27, 2018
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
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

a


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

In women, pharmacodynamic differences include increased sensitivity to (and increased effectiveness of) beta-blockers, opioids, selective serotonin reuptake inhibitors, and typical antipsychotics.

Did you know?

Illicit drug use costs the United States approximately $181 billion every year.

The two bright stars are (left) Alpha Centauri and (right) Beta Centauri. The two bright stars are (left) Alpha Centauri and (right) Beta Centauri.
Model of a Neutron Star’s Interior Model of a Neutron Star’s Interior
Australopithecus sediba shares small brain size with other members of Australopithecus but also has Australopithecus sediba shares small brain size with other members of Australopithecus but also has
Average household size Average household size
a solution is prepared in which a trace or small amount of Fe2+ is added to a much larger ... a solution is prepared in which a trace or small amount of Fe2+ is added to a much larger ...
Distribution Patterns and Population Size Estimates (Bio 30) Distribution Patterns and Population Size Estimates (Bio 30)
Video: Haustral churning, Gastrocolic reflex and mass peristalsis & Defecation

For a complete list of videos, visit our video library