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# Quantum Mechanics

In quantum mechanics, particles do not possess well-defined positions and speeds. Rather, these values are represented by something called a wave function

A wave function is a set of numbers, each one representing a different point of space. The size of the wave function predicts the probability that the particle will be found in each point of space.

So, We can’t predict the future but we can make it :)

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MORE IDEAS ON THIS

### It Might Be Possible To Predict The Future –But It’s Unlikely

Laplace argued that if we knew the positions and speeds of all the universe’s particles, we could calculate their future behavior.

But Heisenberg discovered that due to the way , light waves are packaged into discrete units called quanta, “you cannot measure both the sp...

384

### There’s No Easy Answer To The Question Of Alien Life

• It’s estimated that 20 percent of all stars have Earth-like planets orbiting them in the Goldilocks Zone . ( a region capable of sustaining life because it’s not too distant from its star to be an icy wasteland, but not close enough to fry its inhabitants)
• There are ...

369

### Mass And Energy Relationship

• Einstein realised that two of the main ingredients needed to make a universe—mass and energy—are basically the same thing.🤯
• His famous equation E = mc^2 simply means that mass can be thought of as a kind of energy, and vice versa.

377

### So Where Is All This Negative Energy Today ?

• Space itself is a vast store of negative energy. Enough to ensure that everything adds up to zero.
• The universe is like an enormous battery storing negative energy.
• It means that if the universe adds up to nothing, then we don’t need a God to create i...

375

### What Are The Three Ingredients We Need To Cook Up A Universe?

1. The first is matter—stuff that has mass.
2. The second thing we need is energy.
3. The third thing we need to build a universe is space.

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“When we see the Earth from space, we see ourselves as a whole. We see the unity, and not the divisions. It is such a simple image with a compelling message; one planet, one human race.”

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### Moore’s Law

………suggests that “computers can double their speed and capacity every 18 months. If our gadgets keep following Moore’s law, AI may surpass human intelligence within the next hundred years, making the possibility of a self-aware Skynet less remote.”

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“So remember to look up at the stars and not at your feet.

Try to make sense of what you see and wonder about what makes the universe exist.

Be curious.

### STEPHEN HAWKING

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“When you look at the vast size of the universe, and how insignificant and accidental human life is in it, that seems most implausible.”

385

### So Why Isn’t Our Sun Currently Not Collapsing?

• Stars supports itself against its own gravity through the creation of thermal pressure.
• Inside every star, a huge amount of energy is being generated through nuclear reactions (fusion) which convert hydrogen into helium.
• Eventually, a star ...

388

### What Is A Negative Energy ?

• Space and energy can materialise out of nothing. The laws of physics demand the existence of something called “negative energy.”

Imagine a man wants to build a hill , To make this hill he digs a hole in the ground and uses that soil to dig his hill.

...

390

### What Are Black Holes ?

• ….. was a star so massive that it had collapsed in on itself.
• It’s so massive that not even light can escape its gravity, which is why it’s almost perfectly black.
• It’s gravitational pull is so powerful, it warps and distorts not only light but also...

390

### IS THERE A GOD?

• At the instant of the Big Bang , Time itself began 🤯.
• There was no time before the Big Bang.
• So there is no time for God to make the universe in.
• No one created the universe and no one directs our fat...

429

### What Came Before The Big Bang ?

• Most massive objects – like black holes – can warp space-time so violently that time itself stops.
• By following the “chain of causality” back to its furthest point, we can prove the Big Bang couldn’t have a cause because time didn’t exist.

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“We are inconsequential cosmic dust, bumping and milling about on a tiny blue speck. We imagine our own importance. We invent our purpose—we are nothing.

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### What’s A Big Bang ?

• In nanoseconds, the universe went from an infinitely dense point ( maybe smaller than a proton ) to a rapidly expanding body which continues to grow today.
• Evidence supporting such a theory first appeared in 1965, with the discovery of faint backgrou...

372

### To Survive On Earth, We Need To Take Immediate Action

• Global warming might be Earth’s most immediate threat, but we also face a greater one: nuclear annihilation.
• Our planet could end up like the surface of Venus – a planet not known for its hospitable conditions (250 degree Celcius and evening showers of sulphuric acid).
• In th...

371

### Forces And Laws Govern Our Universe

• The universe is a machine governed by principles or laws.
• The laws of nature are a description of how things actually work in the past, present and future.

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### Even Light Cannot Escape A Black Hole – But Something Can !! 🤯

• Hawking discovered that black holes release particles at a steady rate ( Hawking Radiation).
• His theory argues that space is filled with particles and antiparticles. They’re in a constant process of bonding, separating and then annihilating one another.
• The ...

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# CURATED BY

"A good idea should be like a girl's skirt; long enough to cover the subject and short enough to create interest."

If time travel is possible, where are the tourists from the future?

Related collections

## More like this

### Erwin Schrödinger proposed a paradox

Erwin Schrödinger was a Nobel prize-winning physicist. Schrödinger proposed a paradox in 1935 to illustrate a point in quantum mechanics about the nature of wave particles.

At the center of quantum theory is the idea of a wave function. A wave-function describes all the possible states sub...

### Quantum mechanics' equation

In quantum mechanics, the equation

• H^ψn=Enψn

Where,

• E = the energy corresponding to a wave function
• V = the potential
• H^ = the Hamiltonian operator

The equation is analogous to the equation:

E=T+V

### Dualities

Duality is a closely related idea to symmetry. Wave-particle duality has been around since the beginning of quantum mechanics. But newfound dualities have shown interesting relationships. For example, a three-dimensional world without gravity can be mathematically equivalent to a fou...

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