PHYSIC RAY

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35.

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)

更新:

1不用解釋

更新 2:

不是不用解釋,只是第1小項不用解釋

更新 3:

解釋= =

2 個解答

評分
  • 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

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