For certain angles, TOTAL INTERNAL REFLECTION can occur when ...

[futuristic]

For certain angles, TOTAL INTERNAL REFLECTION can occur when light tries to pass from one medium to another which has
 
  A) a larger index of refraction.
  B) a smaller index of refraction.
  C) the same index of refraction.
  D) an index of refraction which is sin-1 (45).
  E) an index of refraction which is sin-1 (n).

Question 2

Two beams of coherent light travel different paths arriving at point P. If the maximum constructive interference is to occur at point P, the two beams must
 
  A) arrive 180 out of phase.
  B) arrive 90 out of phase.
  C) arrive 45 out of phase.
  D) travel paths that differ by a whole number of wavelengths.
  E) travel paths that differ by an odd number of half-wavelengths.

[Gabe]

Answer to Question 1

B

Answer to Question 2

D

[futuristic]

TYSM

[Liddy]

Excellent