Which of the following best describes why we say that light is an ...

[darbym82]

Which of the following best describes why we say that light is an electromagnetic wave?
 
  A) The passage of a light wave can cause electrically charged particles to move up and down.
  B) Light can be produced only by electric or magnetic appliances.
  C) The term electromagnetic wave arose for historical reasons, but we now know that light has nothing to do with either electricity or magnetism.
  D) Light is produced only when massive fields of electric and magnetic energy collide with one another.

Question 2

Based on current evidence, a supercluster is most likely to have formed in regions of space where ________.
 
  A) the acceleration of the expansion was proceeding faster than elsewhere
  B) the density of dark matter was slightly higher than average when the universe was very young
  C) supermassive black holes were present in the very early universe
  D) there was an excess concentration of hydrogen gas when the universe was very young

[lin77x]

Answer to Question 1

A

Answer to Question 2

B

[darbym82]

YES! Correct, THANKS for helping me on my review

[raili21]

Great answer, keep it coming