Quiz on Laser Principles and Applications

What is the process called when an atom absorbs a photon and transitions to a higher energy state?

• Spontaneous Emission

• Stimulated Absorption

• Stimulated Emission

• Photon Emission

Which of the following is a characteristic of spontaneous emission?

• It is deterministic in nature.

• The emitted photons are coherent.

• The directions of emitted photons are random.

• It requires an external electromagnetic field.

In stimulated emission, what happens to the emitted photon?

• It has a different frequency than the absorbed photon.

• It is emitted randomly.

• It is identical to the absorbed photon.

• It is emitted only in one direction.

What is the role of the active medium in a laser?

• To absorb all incoming photons.

• To reflect the laser light.

• To contain atoms that can be excited to a metastable energy level.

• To provide a cooling mechanism.

Which application is NOT typically associated with lasers?

• Surgical Applications

• Optical Storage

• Reading Barcodes

• Thermal Insulation