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在空气里观察水中物体时,象的位置大致分两种情况,一种是只有上移无侧移,一种是既有上移又有侧移,并偏向观察者。上述结论也可用一个简单实验加以证实。将侧壁带有阀门的玻璃器皿盛满水,先用一根筷子斜插在水中,用两只眼睛先在筷子的正上方顺着筷子的倾斜方向看(两眼保持关于筷子的轴对称),两只眼在同一水平面,这时只发现筷子折了;然后再拿一根筷子在水面上方移动筷子尖的位置,使被水面反射的筷尖的象和两眼观察斜插在水中筷子尖的象重合,这时要
When observing an object in the air, the position of the elephant is roughly divided into two cases. One is that there is no sideshift on the top, and the other is that there is both an upward shift and a sideshift, and the viewer is biased. The above conclusion can also be confirmed by a simple experiment. Glassware with valve on the side wall filled with water, first with a chopsticks obliquely inserted in the water, with two eyes first in the direction of the tilt of the chopsticks directly above the chopsticks (both eyes keep axisymmetrical about the chopsticks) The two eyes are on the same level, only the chopsticks are broken; then a chopstick is used to move the chopsticks over the water so that the chopstick tip reflected by the water surface and the two observations are obliquely inserted into the chopsticks The coincidence of the images