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牛顿曾让太阳发出的白光经三棱镜折射，结果得到了各种单色光．这是由于各种单色光在同一种棱镜中折射率不同的缘故（光路图如图１）．那么由白光色散后的单色光能否重新复图１合得到白光呢？结论很显然，当然行．是否再在光路上加一个同样的三棱镜倒放就可以了呢？中师《物理?
Newton once let the white light from the sun refract through the prism, resulting in a variety of monochromatic light. This is due to the fact that different monochromatic lights have different refractive indices in the same type of prism (the optical path is shown in Figure 1). Then can the monochromatic light after being dispersed by white light recombine figure 1 and get white light? The conclusion is obvious, of course. Is it possible to add an identical prism to the light path? The teacher "Physics?