What Is the Primary Difference Between Lasers and Light-Emitting Diodes

question 20

Multiple Choice

What is the primary difference between lasers and light-emitting diodes (LEDs) ?

• A) Laser light is monochromatic and LED light is polychromatic.
• B) Light emitted by LEDs has limited coherence and directionality.
• C) Laser light can produce heat in biological tissues and LEDs cannot produce heat.
• D) LED light is produced by radio waves emitted by supra-luminous diodes.

---

Definitions:

Minor Burn

A burn injury that affects only the outer layer of skin, typically healing without significant medical intervention.

Myopia

A common vision condition also known as nearsightedness, where objects far away appear blurry while close objects can be seen clearly.

Objects Clearly

The capacity to see or perceive things with clarity and sharpness.

Close Range

A short distance between two points or objects, often used in reference to shooting or photography where the subject is near the shooter or the camera.