《教学通讯》(理科版)1981年第四期发表了人民教育出版社景常同志题为《振动图象和波的图象》一文,本刊摘载如下:高中物理课本上册第278页图8—30两幅图象,不少学生认为错了。认为 t=3秒=3/4T 时波还没传出一个波长,只能象课本图8—24中旁边标着3/4 T 的那条曲线;距波源 x=12厘米处的质点,应从 t=T/2=2 In the fourth issue of the “Teaching Newsletter” (Science Edition) published in 1981, the article titled “Image of Vibrating Images and Waves” by Comrade Jing Jing of the People’s Education Publishing House, was published as follows: High School Physics Textbook Vol. 8-30 images, many students think wrong. It is believed that when t = 3 seconds = 3/4T, a wavelength has not been transmitted yet, only the curve marked 3/4 T next to the text in Figure 8-24; the particle from the wave source x = 12 cm should be t=T/2=2