摘要
白光是由不同颜色混合而成的。光以波的形式进行传播，不同的颜色具有不同的波长。物体显出特定的颜色是因为它们会对这个颜色进行反射或者散射——叶子之所以看起来是绿色的，是因为它反射绿光。
White light is made up of a mixture[混合] of different colours. Light travels in waves, and different colours have different wavelengths[波长]. Things seem a particular colour because of the light they reflect[反射] or scatter[散射]--a leaf appears green because it reflects green light.
