It all starts with how we perceive brightness.

这一切都源于我们如何看待光线。

The doctor says your eyes can't be exposed to any light.

医生说你眼睛不暴露在光线下。

A large retina collects more light, more visual information.

巨大视网膜收集更多光线和视觉信息。

If anything, try to expose yourself to warm, dim light before bed.

如果有可，尽量让自己在睡前处于暖和暗色调光线之下。

To paint not objects in light, but the light itself.

他们不描绘光线中物体 而是光线本身。

And that red light is just scattered light in the camera optics.

那条红色光线只是相机 光学部件散射出光。

Far below me, the ground fell away and down to a river.

远远地，在我下方，地面（仿佛在随光线）向下延伸，（逐渐）退落，显露出谷底河流。

So, it's what happens when you have no light reflected back to the viewer.

所以，它就是一种没有光线从物体上反射回来现。

That helps to spread the light around.

这有助于光线扩散。

Reading in dim light does harm to the eyes.

在昏暗光线下看书对眼睛有害。

Scientists have created metamaterials to guide rays of light around tiny, two-dimensional objects.

科学家已经制造出超材料引导光线绕过微小二维物体。

I began to walk about the room, examining various indefinite objects in the half darkness.

我开始在屋子里随便走走，在半明半暗光线中看看各种各样模糊不清摆饰。

It must have been a trick of the light.

一定是光线问题。

Vision depends on light entering the eye...a form of ocular intromission, if you will.

视觉依赖于进入眼睛光线，如果你不介意这种说法，这是一种“眼睛插入”。

These tiny spheres scatter light, giving opal its characteristic rainbow sheen.

这些小球状体分散了光线，赋予了欧泊最具特色五彩光泽。

Currently, scientists treat the object with adhesive paper and light making a fingerprint visible.

目前，科学家们用胶粘纸和光线处理这些物品，使指纹清晰可见。

So if lights bending, that means that space and time have to be warped.

所以如果光线弯曲，那就意味着空间和时间必须是弯曲。

But that means that retinas in your eyes are not catching the light, either.

但这代表你视网膜也无法捕捉到任何光线。

You know, film speed, the light, you know.

我们在一起探讨拍摄速度、光线这些东西。

Just finding soft light, just kind of gently fills the room.

只要一点柔和光线，轻柔地充满整个房间。