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看一看观察阳光透过树叶的缝隙时产生的树荫(图1),你看到了什么?能提出什么问题? 见到许多大致呈圆形的光斑,这些光斑是从哪里来的呢?也见到一些非圆形的光斑,这种光斑又是怎样形成的呢?
Take a look at the shades of the sun as you look through the gaps in the leaves of the sun (Figure 1). What do you see? What questions can you ask? See a lot of roughly circular spots. Where did these spots come from? Seeing some non-circular spots, how is this spot formed?