F4 physic!(Wave motion)

2 個解答

評分
  • 天同
    Lv 7
    9 年前
    最愛解答

    No. of maxima = 10/2 = 5

    There are 5 maxima exist.

    2011-11-01 19:45:53 補充:

    Thanks for pointing out my mistake. Five (5) maxima is the no. on one side of the central line (including the central maximum). Hence, there are 4 maxima on each side of the central line. The total no. of maxima is thus (4+1 +4) = 9.

    2011-11-01 19:47:36 補充:

    You may look at the following animation, you could set the source separation and wavelength. Pause the motion and you can count the no. of maxima.

    http://www.walter-fendt.de/ph14e/interference.htm

    2011-11-01 19:52:10 補充:

    The equation invloved is: a.sin(theta) = m.入

    i.e. m = a.sin(theta)/入

    Setting (theta) = 90 degees (i.e. sin(theta) = 1) includes all maxima on one side of the central line including the central maximum.

    This gives m = 10/2 = 5

  • To 天同:

    The answer is 9...

還有問題嗎?立即提問即可得到解答。