A light ray P is totally reflected in a medium X as shown below. Which of the following statement(s) is/are correct?
The angle a is greater than the critical angle.
The refractive index of medium X is smaller than that of medium Y.
The intensity of the light ray Q increases if angle a is further increased.
A. (1) only B. (1) and (2) only
C. (2) and (3) only D. (1), (2) and (3)
- 匿名1 十年前最愛解答
The answer is A (1 only).
2010-03-27 21:23:23 補充：
Refractive index of y has to be smaller than x if total reflection can occur in medium x. Think about water and air, total reflection can occur in water but not air.
2010-03-27 21:24:50 補充：
As long as there is total reflection, the light intensity is the same no matter what the angle is.
- 1 十年前
agree with tonyfan