Quiz: Quantum Entanglement: Spooky Action at a Distance

Question 1

What is the primary characteristic of quantum entanglement?

Accepted Answer

The state of one entangled particle is instantly correlated with the state of another, no matter the distance.

Answer

Particles move faster than the speed of light.

Answer

Entangled particles have a physical connection through space.

Answer

Entanglement can be used to send information faster than light.

Question 2

Which scientist is most famously associated with coining the term "spooky action at a distance" to describe quantum entanglement?

Accepted Answer

Albert Einstein

Answer

Werner Heisenberg

Answer

Niels Bohr

Answer

Erwin Schrödinger

Question 3

If two particles are entangled and one is measured to be spin-up, what can be said about the state of the other particle?

Accepted Answer

It is definitely spin-down.

Answer

It is also spin-up.

Answer

It is in a superposition of both spin-up and spin-down.

Answer

It is random and uncorrelated.

Question 4

Why can't quantum entanglement be used to send information faster than the speed of light?

Accepted Answer

Because the outcome of a measurement is random and cannot be controlled.

Answer

Because entangled particles physically connect through space.

Answer

Because information requires a measurable signal, which cannot be transmitted faster than light.

Answer

Because quantum entanglement only works on Earth.

Question 5

In an experiment with entangled particles, if one particle is measured and its state collapses, what happens to the other entangled particle?

Accepted Answer

Its state also collapses instantaneously to a correlated state.

Answer

It remains in a superposition until measured.

Answer

Its state remains unchanged.

Answer

It is affected only after a signal travels between the particles at the speed of light.