We are walking on Earth. We are touching things. We feel emotional sometimes.
Although 99.99% of our body is empty. Even everything you can see is 99.99% Empty. The whole universe is Empty space. Because 99.99% space of Atom is Empty. Between the two stars, there is vast empty space.
How 99.99% of Atom is Empty
There are two different regions in Atom. One is nuclei which include proton and neutron. The second one is electron containing region. In nuclei protons and neutrons are tightly bonded to each other by the strong nuclear force. So, there is no empty space between them. The nucleus is surrounded by Electrons. The size of electrons is negligible compared to the nucleus.
Now, the interesting fact to know is the space between the nucleus and electrons. Atoms are 100,000 bigger than nucleus in size.
So Why we feel something when we touch things
Why we can’t simply pass through walls. Let me tell you Empty Space is not really empty. According to the Uncertainty principle empty space is filled with a pair of particles. When the wheel rotates you can’t see space in the wheel. Electrons are also constantly moving.
According to quantum mechanics, electrons are everywhere inside the atom. When we touch we feel something. Actually, we don’t feel anything. Its electrons of your hand push electrons of other things by Electromagnetic Force. Sometimes we feel happy, sometimes sad but still, we are the way to understand the universe.
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Do read What is Atom