Author Question: What causes stars to twinkle? A) It is intrinsic to the starstheir brightness varies as they ... (Read 47 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?

The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.

Did you know?

Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.

Did you know?

A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Did you know?

Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

For a complete list of videos, visit our video library