In a closed universe a beam of light will: A) come back to ...

[segrsyd]

In a closed universe a beam of light will:
 
  A) come back to where it originated.
  B) continue on forever.
  C) move on a circular path around its origin.
  D) reflect off the edge of the universe and come back.
  E) go on some strange path, never to return.

Question 2

The 21 cm line of hydrogen is strongly absorbed by interstellar dust.
 
  Indicate whether the statement is true or false

[Juro]

Answer to Question 1

A

Answer to Question 2

FALSE

[segrsyd]

Thank you!

[Juro]

Always glad to help...