光子没有质量——它们是没有重量的。
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。
This gives you a little bit of an idea of just how many individual photons there are in a laser beam of light.
与光子或声波的物理实体不同，感知是大脑的产物。
More than the physical reality of photons or sound waves, perception is a product of the brain.
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。
UHECRs tend to collide with photons of the cosmic microwave background—pervasive radiation that is a relic of the early universe.
可见光子或粒子的能量因颜色不同而不同。
The energy of a light photon or particle is different for each color.
普朗克—爱因斯坦关系式用光子的频率来描述每个光子的能量。
The Planck–Einstein relation describes the energy of each photon in terms of the photon's frequency.
而这也是光子晶体所能做到的。
最终，电磁光子转化成光波长。
Eventually, the electromagnetic photons are shifted to optical wavelengths.
它不代表每一个光子，有更高的能量。
你们可以看到我在向屏幕放射单光子。
So now I am firing individual photons at the screen, as you see.
著名的例子包括光子(光)和中微子。
发射光子的能量怎么样？
一个被称作a的光子来自最初的信源。
当光子以充足的能量轰击硅就产生了电子空穴对。
When photons with sufficient energy strike the silicon they create pairs of electrons and holes.
光子发射，可能。
结果就是，当电子损失能量是，它不会释放光子。
As a result, the electron will not emit a photon when it loses energy.
那什么是光子呢？
波粒二象性应用于光子上。
现在我们知道“量子物体”可能不需要单个粒子或光子。
We now know that "quantum objects" might not need to be single atoms or photons.
光束粒子——称为光子——携带的能量取决于它们的频率。
Light particles - called photons - carry a packet of energy that depends on their frequency.
读取每个光子，实际上也是其破坏光子上信息的过程。
By recording each photon, she actually destroys what she is measuring.
随后进入衰退期，释放出中等大小的红外光子或是光子。
They subsequently "de-excite" and emit mid-infrared light particles, or photons.
这个光子分子构成了光子的陷阱，提高了光子对的收集效率。
This photonic molecule constitutes a trap for each of the photons of the pair and allows them to be collected efficiently.
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。
And if anyone attempts to intercept the photons, the properties get disturbed and an alarm is raised.
光子就这样轮流地将它的偏振标记留给下一个光子，因而增强了信号。
This in turn left its mark on the polarization of the next photon, so amplifying the signal.
有经验的物理学家们这时已经可以控制单个的光子或者由极少数的光子组成的场。
Experimentalists now play with single photons or with fields made of a small controlled number of light quanta.
如果你把它放到大气层上，一个光子，一个紫外光光子，有能量可以破坏它的化学键。
If you get some of these in the upper atmosphere, a photon, an ultraviolet photon, has the energy capable of breaking this bond.
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。
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。
Thanks to the gradient, the stream of emitted photons is the same as the stream of absorbed photons.
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