Cómo funcionan los láser (en teoría)

The video explains how a collection of atoms can be excited to emit light, leading to a chain reaction where photons stimulate others to emit more light. This process is enhanced by using mirrors to create a coherent light beam, known as a laser. Photons tend to align in the same state, which is why they emit light together. The video also discusses the unique behavior of photons compared to other particles, emphasizing their tendency to be in the same state and direction.

What happens when a large collection of atoms is excited?

• They change their physical state.

• They absorb light and become stable.

• They stop interacting with photons.

• They emit light spontaneously.

How do photons differ from coins in terms of their states?

• Photons are more likely to be in the same state.

• Photons have no preference for state.

• Photons prefer to be in different states.

• Photons can be easily distinguished from one another.

What is a unique property of photons that affects their behavior?

• They can change color.

• They have a fixed mass.

• They have the same phase and polarization.

• They can be split into smaller particles.

What occurs when a lone photon passes near an excited atom?

• The atom absorbs the photon.

• The photon changes direction.

• The atom emits another photon.

• The photon loses energy.

How is a laser beam created from photons?

• By allowing coherent light to escape through a small opening.

• By cooling the photons to absolute zero.

• By reflecting photons off a single mirror.

• By absorbing all photons in a chamber.