What are the key differences between quantum mechanics and classical physics?

What are the key differences between quantum mechanics and classical physics?

Quantum mechanics deals with the behavior of particles at the atomic and subatomic levels, while classical physics describes the motion of larger objects. In quantum mechanics, particles can exist in multiple states at once, a phenomenon known as superposition, whereas classical physics follows deterministic laws.

Can you explain superposition in simpler terms?

Sure! Superposition means that a particle can be in multiple states at the same time until it is observed. For example, think of a spinning coin; it can be both heads and tails until you stop it and look.

What about entanglement? How does that work?

Entanglement is a phenomenon where two particles become linked, so the state of one instantly influences the state of the other, no matter how far apart they are. It's like having two dice that always show the same number, even if one is on Earth and the other is on the Moon!

How does classical physics explain motion differently?

Classical physics uses laws like Newton's laws of motion, which state that objects have definite positions and velocities. It predicts how objects will move based on forces acting on them, without the uncertainty found in quantum mechanics.

Which one is more accurate for everyday life?

For everyday life, classical physics is usually more accurate because it describes the motion of larger objects well. Quantum mechanics becomes significant at very small scales, like atoms and particles.