Nanoseconds are nanoseconds, when light waves are traveling through a medium. That’s it. That’s all the time it takes for a light wave to travel through a medium. It’s actually a really cool concept and we are going to talk about it in more detail in the future.
I think we all can agree that nanoseconds are a lot less important than they seem. But for now, we have to give you a quick refresher. nanoseconds are a tiny fraction of a second (nanoseconds are one-millionth of a second) and are so tiny that they only take up a fraction of a second when considering the speed of light.
Just like many other things, their importance varies from person to person. Some people think nanoseconds are a really, really small fraction of a second.
nanoseconds are one of those things that just keep on giving. I can’t tell you how many times a week I read a post on my blog or Twitter feed that goes something like, “Wow, I just noticed that nanoseconds are one-millionth of a second. I didn’t know that, but now it’s just so easy to remember.
A second is one-millionth of a second. It’s the amount of time it takes for a wave of light to travel a one-mile distance (though this is a different way of measuring the speed of light). When you think of nanoseconds, you’re thinking of the length of time it takes light to travel from a point to another.
How many nanoseconds in a second is hard to remember because you only really think of it in terms of the time it takes light to travel from your eyes to your brain. But it is a very important number. The speed of light increases by 1/1000 in a second. So there are 1/1000 of a second between the first time you notice you saw a star and your brain telling you that it is a star and you are now seeing it for the first time.
The number of nanoseconds in a second is the fundamental speed limit for a photon—the speed at which light can travel. Until the dawn of quantum physics, that was the only speed limit. The fundamental speed limit is so important that no one has ever seen a photon travel faster than light. Before the discovery of relativity, it was thought that light could only travel at the speed of light.
The same principle that makes light travel at light speed is also at the heart of how we see things. Our eyes are capable of seeing things at the speed at which light can travel. The question is, how fast can we see things? That’s where the “nano” comes from. What this means is that seeing the world at nanoseconds is, well, just fast.
The nano is a tiny quantum-mechanical device that the human eye can detect. It’s actually so tiny that a person can make out tiny details about a person or object in their environment even with the naked eye. The size of a postage stamp, the speed of light, and the fact that it’s invisible and intangible make it extremely difficult to determine the speed of an object in the world.
In other words, the nano is like the fastest-thing-sensor we have, but it is in fact tiny. So if you look at something and it’s moving fast, but you can’t see it, it’s easy to tell that it’s moving by looking at the size of the object. Also, it’s very hard to see something moving at a slow pace.