扬州市2007年初中毕业、升学统一考试物理试卷中有这样一道题:小明和小红在课堂上测量了老花眼镜的焦距。他们联想到:能否测量近视眼镜的焦距呢?于是,他们在课后对此问题展开了探究:(1)他们想到近视眼镜属于凹透镜,回忆了凹透镜对光线的作用,请你帮他们完成图中的光路图。(2)如果要利用太阳光测量近视眼镜的焦 In Yangzhou City in 2007, there was such a question in the physics examination for graduation and entrance examinations: Xiao Ming and Xiao Hong measured the focal length of reading glasses in class. They think that: Can you measure the focal length of myopia glasses? Then, they explored this question after class: (1) They think that myopia glasses are concave lenses, and recall the effect of concave lenses on light. Please help them complete the figure. Light path illustration. (2) If you want to use sunlight to measure the focus of myopia glasses