Before light can undergo total internal reflection when incident ...

[bucstennis@aim.com]

Before light can undergo total internal reflection when incident on material 1 from material 2, what must be true of the indices of refraction?
 a. n1 = n2
  c. n1 < n2
  b. Either n1 or n2 must be equal to 1.
  d. n1 > n2

Question 2

The use of fiberglass insulation in the outer walls of a building is intended to minimize heat transfer through the wall by what process?
 a. conduction
  c. convection
  b. radiation
  d. vaporization

[ttt030911]

Answer to Question 1

C

Answer to Question 2

A

[bucstennis@aim.com]

Excellent

[miss.ashley]

Great answer, keep it coming