根据盖利森的意见，光可以通过不同的介质运行，如在通过冷冻的纳气时，光的速度实质上变慢了。 然而这是因为光线在运行介质里的原子之间时，会反复地反弹。
Light traveling through different mediums, such as chilled sodium gas, does slow substantially, but this is because the light is being bounced between the atoms within the medium.
要改变电子速度的唯一方法，是用不同颜色的光。
The only way to change the velocity of the electrons was to use a different color of light.
因为光的不同颜色在水里以不同的速度传播，所以光分解成各种颜色。
The light is broken into colors because different colors of light travel at different speeds in water.
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