The two forms of electromagnetic (E-M) radiation that experience ...

[TVarnum]

The two forms of electromagnetic (E-M) radiation that experience the least atmospheric opacity are
 
  A) visible light and infrared waves.
  B) X and gamma radiation.
  C) microwaves and radio waves.
  D) ultraviolet and infrared waves.
  E) visible light and radio waves.

Question 2

What was the Stardust mission?
 
  A) a mission to study the composition of an asteroid by hitting it with a massive object and observing the material thrown into space
  B) a mission to study the outer planets of the solar system by sending a probe from one to the next with a wide variety of instruments
  C) a mission to study the composition of a comet by collecting material from its tail and return that material to Earth
  D) a mission to study the surface structure of a comet by dropping a lander onto its surface

[micaelaswann]

Answer to Question 1

E

Answer to Question 2

C