让一束白光射到玻璃棱镜上,光线经过棱镜折射以后就在另一侧面的白纸屏上形成一条彩色的光带,其颜色的排列是靠近棱镜顶角端是红色,靠近底边的一端是紫色,中间依次是橙黄绿蓝靛,这样的光带叫光谱。光谱中每一种色光不能再分解出其他色光,称它为单色光。由单色光混 Let a bunch of white light hit the glass prism, the light refracted by the prism on the other side of the white paper screen to form a colored light band, the color arrangement is close to the corner of the prism is red end, near the bottom end Is purple, followed by the middle of the yellow-green-blue indigo, such light band called the spectrum. Each color spectrum of light can not be decomposed into other shade, called monochromatic light. Mixed by monochromatic light