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波的图象和波的传播问题,是高考的热点,每年各省市物理或理综卷,几乎都有此题材的题目,而且年年都能花样翻新。本文把2012年高考关于波的传播和波的图象问题归纳一下,研究它的解题方法和规律。1.上海市物理卷第24题例1如图1,简谐横波在t时刻的波形如实线所示,经过△t=3s,其波形如虚线所示。已知图中x_1与x_2相距1m,波的周期为T,且2T<△t<4T。则可能的最小波速为
Waves of the wave of images and the issue of communication is the hot college entrance examination every year, provincial or municipal physical or rationale volume, almost all have the subject matter of this subject, and every year can be retrofitted. This article summarizes the college entrance examination in 2012 on the issue of wave propagation and wave imaging, and studies its method and law of problem solving. 1. Shanghai Physics Vol. 24 Example 1 As shown in Figure 1, the waveform of the harmonic harmonic wave at the time t is shown as a solid line. After the waveform △ t = 3s, its waveform is shown as a dotted line. It is known that x_1 is 1m away from x_2, the period of the wave is T, and 2T <Δt <4T. The minimum possible wave velocity is