- Ultraviolet light can be seen by certain animals, such as insects and some birds.
- Electromagnetic waves such as radio waves travel at the speed of light in vacuum.
- It is impossible to predict the behavior of atoms using standard physics.
There are certain times when taking an esoteric approach to life can prove to be helpful.
Often people that think that way place a lot of value into things one cannot see but are able to feel them. Sometimes those are things whose existence can be scientifically proven but cannot be seen with the naked eye. Some of those things physically exist, while others are impalpable. Whatever the case may be, the world is filled with fascinating things that exist beyond what we can see, and here are just some of those!
While we can sometimes see how emotions affect other people physically, they are not a thing we can perceive with our eyesight. However, they are still biological states that are tied to our nervous system and are very much real. They are impossible to define, but they do exist and are often tied to our temperaments, personalities, and mood.
11. The Mind
Another aspect of human beings that we will never be able to perceive is the mind. Our thoughts and the things we can think of are entirely intangible to our eyes. Through our mind, we can imagine things; it holds our consciousness, our ability to perceive and memorize things. It is, however, still invisible to our eyes, and probably will be for quite some time.
Gravity, a phenomenon in nature that brings everything with mass together, is something we can measure but not see. In other words, gravity is responsible for things that gravitate toward one another. It gives weight to all physical things on our planet and is also the cause of many enormous structures in our universe. However, we are not able to observe it.
9. Ultraviolet Light
Ultraviolet light is a type of electromagnetic radiation that has a shorter wavelength than visible light. It exists in sunlight, and it is the cause of sunburn. Certain animal species can see ultraviolet rays, such as bumblebees, but for us humans, it remains invisible.
It seems like a silly addition to this list, but oxygen is one of the main reasons we can stay alive, and yet it is impossible for us to see it. It is a chemical element that is the third most plentiful in the universe. The first two are hydrogen and helium.
7. Infrared radiation
Infrared radiation or infrared light is a type of electromagnetic radiation. Everything that gives off heat can radiate infrared waves, but they still remain invisible. Infrared radiation has longer wavelengths than visible light, and once it reaches certain high wavelengths, it can be seen by humans. But multiple complicated conditions need to be fulfilled for that to happen, so it should generally be considered invisible to the human eye.
6. Radio Waves
Keeping up with the theme of electromagnetic waves, we have radio waves. They are employed for data transmission and are used for radio, computer networks, and satellites. They travel at the speed of light when in a vacuum, which is a quality shared by all electromagnetic waves.
Atoms are the smallest components of matter that make up a chemical element. Everything we can perceive in our universe is composed of trillions of atoms. Atoms are tiny, which makes predicting their behavior impossible since we cannot use physics to do so. They are also, of course, invisible to the human eye.
4. Dark Matter
Dark matter is a special type of matter that does not emit energy or light. Most experts believe that dark matter has an immense significance in the creation and the structure of the universe. They think that it makes up for 85% of the entirety of the matter in our universe, but it is still mostly an unknown force. We call it dark matter because it does not interact with light.
Antimatter can be easily defined as matter that is made up of particles that are the opposite of the particles found in “regular” matter. It thereby possesses characteristics that are opposite to those of normal matter. When antimatter and matter collide, they annihilate each other.
2. Quantum Particles
Quantum particles, also known as subatomic particles, are smaller than atoms. Since we already covered atoms earlier in the article, it makes sense that anything smaller than an atom cannot be seen with the human eye either, right?
1. The Universe
While we can see parts of our universe by using telescopes, we are still completely unaware of its entire magnitude. How large is it actually? Will we ever be able to see it in its entirety? Does it even have an end, or is it infinite? Those are just some of the questions we can ask while trying to figure out the universe.
However, we know that for now, we cannot observe it, we can only get small glimpses of it.