The main problem with early attempts to listen for radio signals ...

[mspears3]

The main problem with early attempts to listen for radio signals from space was
 
  A) that they were conducted at relatively low frequencies which have problems penetrating the Earth's upper atmosphere
  B) building receivers sensitive enough to detect extraterrestrial signals
  C) that they were conducted at relatively high frequencies which have problems penetrating the Earth's lower atmosphere
  D) interference by radio waves from the Sun

Question 2

Light traveling at an angle into a denser medium is refracted
 
  A) toward the normal.
  B) away from the normal.
  C) perpendicular to the normal.
  D) parallel to the normal.
  E) equally.

[pikon]

Answer to Question 1

A

Answer to Question 2

A

[mspears3]

Both answers were spot on, thank you once again

[pikon]

Great! Please up vote