Photons have no mass – they are weightless.
光子没有质量——它们是没有重量的。
More than the physical reality of photons or sound waves, perception is a product of the brain.
与光子或声波的物理实体不同，感知是大脑的产物。
This gives you a little bit of an idea of just how many individual photons there are in a laser beam of light.
这让你对一束激光中有多少个光子有了一点概念。
This gives you a little bit of an idea of just how many individual photons there are in a laser beam of light.
这让你对一束激光中有多少个光子有了一点概念。
UHECRs tend to collide with photons of the cosmic microwave background—pervasive radiation that is a relic of the early universe.
UHECRs往往会与宇宙微波背景中的光子相撞，这种辐射是早期宇宙的遗迹，无处不在。
Entangled photons share quantum states.
缠绕态的光子是处于同一量子态的。
What about the energy of the emitted photons?
发射光子的能量怎么样？
Wave particle duality had been applied to photons.
波粒二象性应用于光子上。
Known examples include photons (light) and neutrinos.
著名的例子包括光子(光)和中微子。
So what might these extra photons be doing to our health?
那么，这些多余的光照，会对我们的健康造成怎样的影响呢？
How it works: Photons strike an immense sail of ultrathin material.
工作原理：光子击打在一张用超薄材料制作的巨大的帆上。
So now I am firing individual photons at the screen, as you see.
你们可以看到我在向屏幕放射单光子。
No system is more efficient at converting photons to grid-ready AC power.
不经光子转交流电源系统效率更高。
Eventually, the electromagnetic photons are shifted to optical wavelengths.
最终，电磁光子转化成光波长。
She uses these pulses to determine how to polarise the photons she sends back.
她利用这些脉冲检查她送回的光量子是如何极化的。
We now know that "quantum objects" might not need to be single atoms or photons.
现在我们知道“量子物体”可能不需要单个粒子或光子。
They subsequently "de-excite" and emit mid-infrared light particles, or photons.
随后进入衰退期，释放出中等大小的红外光子或是光子。
If they are the same, the two photons will come out of the beam-splitter together.
如果他们状态一样，这两个光子就在分束器一起出来。
Such a quantum repeater USES groups of three photons for each bit of the message.
这种量子中继器使用一组三个光子对应信息的一个字节。
Somehow the photons still end up, ending up on the screen in an interference pattern.
光子总是会停止运动的，停在屏幕上呈现出相互干扰的模式。
Second, they need to convert those photons into electrons as efficiently as possible.
第二，光电面板需要尽可能高效的将光子转换成电子。
Light particles - called photons - carry a packet of energy that depends on their frequency.
光束粒子——称为光子——携带的能量取决于它们的频率。
The quantum dots also emitted photons 15 times faster after a light spot formed around them.
当其周围形成光斑后，量子点释放光子速度快了15倍。
When photons with sufficient energy strike the silicon they create pairs of electrons and holes.
当光子以充足的能量轰击硅就产生了电子空穴对。
Thanks to the gradient, the stream of emitted photons is the same as the stream of absorbed photons.
而正是这种均匀过渡的结构使纳米晶体上放射出的光子与吸收的光子数量能保持一致。
And if anyone attempts to intercept the photons, the properties get disturbed and an alarm is raised.
如果有人试图拦截光子，光子属性状态将受到干扰，并发出警报。
People are very comfortable talking about individual photons, but now we can talk about waves of matter.
人们能轻松的，讨论单个光子，现在我们要说物质波了。
According to theory, CMB photons should interact with these clusters, getting kicked to higher energies.
根据理论，背景辐射中的光子应该与这些星团相互作用，从而获得更高的能量。
According to theory, CMB photons should interact with these clusters, getting kicked to higher energies.
根据理论，背景辐射中的光子应该与这些星团相互作用，从而获得更高的能量。
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