The smallest thing that we can see with a ‘light’ microscope is about 500 nanometers. A nanometer is one-billionth (that’s 1,000,000,000th) of a meter. So the smallest thing that you can see with a light microscope is about 200 times smaller than the width of a hair. Bacteria are about 1000 nanometers in size.

The human eye can only see visible light, but light comes in many other “colors”—radio, infrared, ultraviolet, X-ray, and gamma-ray—that are invisible to the naked eye. On one end of the spectrum there is infrared light, which, while too red for humans to see, is all around us and even emitted from our bodies.

Red-green and yellow-blue are the so-called “forbidden colors.” Composed of pairs of hues whose light frequencies automatically cancel each other out in the human eye, they’re supposed to be impossible to see simultaneously. The limitation results from the way we perceive color in the first place.

This limit is called visual acuity, when the human eye can no longer discern between two points. Visual acuity is measured not in pixels, but in the resolving angle….Why does resolution matter? Here’s the facts.

Visual stimuli are measured in frames per second. In other words, when you’re looking around, your eyes are viewing visual cues that move at a certain rate, and that rate is called frames per second. Some experts will tell you that the human eye can see between 30 and 60 frames per second.

Beyond that, the human eye wouldn’t be able to perceive any more detail on their screen. There’ll be no great race to 16K or 32K. “That’s about 48 million pixels to fill the field of view,” Huddy explains.

It is possible to strobe a light at 240 Hz and if you look at a fast moving object, you will see the object “frozen” at a number of different positions. Absent a strobe effect, the eye can see changes (flicker) in the 60 to 75 hertz range.

Answer: The higher the refresh rate, the better. However, if you cannot get past 144 FPS (Frames Per Second) in games, there’s no need for a 240Hz monitor unless you want to future-proof your system.

It is advisable to upgrade straight to the 240Hz monitor in this case, you’ll definitely see the difference vs a 60Hz monitor, smoother frames, good response, no screen tear etc. While technically going to 240Hz from a 144Hz panel is a 60% jump, the experience is not a 60% good.

So yes, despite the rumors you may have heard floating around, the human eye is capable of seeing the difference between a 1080p screen and a 4K screen. The most important factors to remember are the quality of your eyesight, the size of your screen and the distance you sit from that screen when watching it.

576 megapixels

Most application developers don’t provide this. This effect is most noticeable when going between a 1080p and a 4K (or higher) resolution monitor. Higher resolution doesn’t necessarily mean easier on your eyes.

Human eyes cannot see things beyond 60Hz. So why are the 120Hz/144Hz monitors better? The brain, not the eye, does the seeing. The eye transmits information to the brain, but some characteristics of the signal are lost or altered in the process.

anything over 120 is going to be minimal at best. 30 to 60 is huge and 60 to 120 is a significant difference. After 144 fps you can barely see any difference. 60 vs 120 is very noticeable for most people my guy.

Some people are OK with getting 20-30 FPS, though it may depend on the game. Getting less than 30 FPS in a fast-paced game may still feel unplayable to some gamers. 30-45 FPS: Playable. Most people are OK playing at this frame rate, even if it’s not perfect.

The World’s Fastest 10 Trillion FPS Camera is Here And it Can Freeze Time. A team of researchers at INRS have smashed the ten trillion fps barrier with their T-CUP ultra-fast camera. A research team at the INRS Universite De Recherche has recently built the world’s fastest ever camera called T-CUP.