The twinkling of a star is most apparent when
A) there is no wind.
B) the night is cold.
C) the atmosphere is relatively uniform.
D) a star is directly overhead.
E) none of the above
Question 2
If the angle of incidence exceeds the critical angle
A) the angle of refraction is the same as the angle of incidence.
B) the light will be absorbed.
C) the light will be diffracted.
D) total internal reflection results.
E) all of the above