Author Question: What causes stars to twinkle? A) It is intrinsic to the starstheir brightness varies as they ... (Read 41 times)

Medesa

  • Hero Member
  • *****
  • Posts: 507
What causes stars to twinkle?
 
  A) It is intrinsic to the starstheir brightness varies as they expand and contract.
  B) variations in the absorption of the atmosphere
  C) variable absorption by interstellar gas along the line of sight to the star
  D) bending of light rays by turbulent layers in the atmosphere
  E) the inability of the human eye to see faint objects

Question 2

The red hydrogen alpha line carries more energy per photon than the blue-green hydrogen beta line does.
 
  Indicate whether the statement is true or false



Yixagurpuldink

  • Sr. Member
  • ****
  • Posts: 341
Answer to Question 1

D

Answer to Question 2

FALSE



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

Did you know?

Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

For a complete list of videos, visit our video library