When polychromatic light reflects from or passes through a diffraction grating it is dispersed into many rays, each of a single wavelength or color.
When polychromatic light reflects from or passes through a diffraction grating it is dispersed into many rays, each of a single wavelength or color.
当多色光从衍射光栅反射或穿过衍射光栅时，就会分成多种发射光线，每一种都有各自的波长或颜色。