This tries to record not only light intensities, but the direction of incoming light as well.

它不仅记录强度，而且也记录入射的方。

A spectrum is the result when you divide the incoming light from an object into individual colors, or wavelengths.

谱是当你把从一个物体的入射分成单独的颜色或波长时产生的结果。

It's the angle of the sun's rays that makes winter cold and summer hot, not our distance from the sun.

阳入射的角度在真正决定了冬和夏的冷热差别，而非距太阳的远近。

The ice crystals reflect incoming light from the sun back into space, which has a cooling effect on the atmosphere.

冰晶将太阳的入射反射回太空，这对大气产生冷却效应。

For a camera it's a diaphragm that governs the amount of incoming light.

对于相机来说，它是控制入射量的圈。

It absorbs about 99.4% of  all the light that hits it.

它能吸收约99.4%的入射。

In either case, the structures act like a maze for incoming photons.

在任何一种情况下，这些结构都像入射子的迷宫。

This is our angle of incidence, so it is big.

这是我们的入射角，所以它很大。

Snell's Law also holds for the next layer, and there the ingoing angle is simply theta 2.

斯涅尔定律也适用于下一层，那里的入射角只是 theta 2。

Here’s how it works: The objective lens takes incoming light rays from a distant source.

工作原理如下：物镜摄取来自远的入射线。

Look at this graph, you can see that the number of photoelectrons emitted increases as the intensity of the incident light increases.

看这张图，你可以看到，随着入射强度的增加，发射的电子数量也在增加。

Keratomileusis corrects what are called refractive errors: imperfections in the way the eye focuses incoming light.

角膜磨镶术可以纠正所谓的屈不正：眼睛聚焦入射的方式存在缺陷。

This term accounts for the fact that energy from the incoming light wave is absorbed by the material.

这一项解释了入射波的能量被材料吸收的事实。

Eventually, she and her colleagues worked out that the dragonfish reflects just one in every 2,000 photons incident upon it-an absorbance of 99.95%.

最终，她和她的同事发现深海龙鱼仅反射入射到其表面的1/2000的—吸度为99.95%。

And then we are going to measure the amount of light that is coming.

然后我们要测量入射的量。

When some are aimed at you, they appear black because they're absorbing most wavelengths of incoming light — but there's no actual opening.

当它们瞄准你的时候，它们看起来是黑色的，因为它们吸收了入射的大部分波长——但没有实际的开口。

The answer, then, comes down to how many times the value of angle fits into 180-degrees, which is pi radians.

那么答案就取决于入射角的值能放进180度（即π弧度）多少次。

Here, incoming solar radiation strips electrons from atoms and molecules, creating a layer of electrons that interfere with radio waves.

在这里，入射的太阳辐射会将电子从原子和分子中剥离，从而形成一层干扰无线电波的电子层。

But watch what happens if we come in at an angle like this.

但请看，如果我们以这样的角度入射，会发生什么。

And whether that interference is constructive or destructive depends on the thickness of the oil and the light's angle of incidence.

而这种干扰是建设性的还是破坏性的，取决于油的厚度和的入射角。