ok, i just did lots of reading up on "Quantum Mechanics" and i tell you it seriously freaked me out. Not as in there's lots to study on this module or its too chim to understand, but it scared shit out of me because its starting to make doubt reality. What exactly is R-E-A-L-I-T-Y?
I checked up thefreedictionary and came up with these possible definitions:
1. The quality or state of being actual or true.
2. The totality of all things possessing actuality, existence, or essence
3. That which exists objectively and in fact

Here comes the problem. According to the video i posted below on quantum physics (it doesn't matter if you ain't a physics student), it demonstrated the weird behaviour of photons.

When individual protons, or particles are fired into the slids, it created 2 identical beams of mark.

When a wave, for example a water wave, is displaced by a vibration, it goes through the 2 slids and the waves interfere with each other, causing disturbance and an interferance pattern.

Now, an electron is fired. Its a particle, so by right it should create the same pattern as when a particle is fired. But didn't! it actually created an interference pattern as if it was a wave..

And here comes the scary part, when a human eye, or a detector is present, the electron actually alters its behaviour, it doesn't create that interference pattern anymore, but instead a 2 slit pattern caused by a particle.

This is odd, eerie and weird. There's one possible theory that explains these very real phenomenon and it scared the shit out of me.

This theory, known as " collapse of wave function" explains how an entity such as a photon or an electron could travel as a wave but arrive as a single particle. According to this theory, what is passing through the apparatus used in the experiment is not a material at all, but a "probability wave". which means that the particle does not have a definite location. but has a probability of being here or there randomly. In this theory, an electron not being observed does not exist as a particle at all, but has a wave-like property covering areas of probability where it could be found. Once the electron is observed, the wave function collapses and the electron becomes a particle.

When we are not looking at the particle, the probability wave of even a single particle, is spread out and will pass through both slits the same time and arrive at the detector as a wave showing an interference pattern. When we observe the electron by placing detectors, it is as if forced into revealing its location which causes the probability wave to collapse into a particle. If this theory is TRUE, it suggests one single implication:

Nothing is real until it has been observed!

So is this quantum theory explaining that in our word, nothing exists until it has been observed?

Is it true that our world, our universe exists only because we are looking at it?
Omg, i'm baffled to the extent of doubting reality.

Its like, what the hell! LOL.

Then how can we define "entity" now?

how can we define our world?

What exactly are, humans?