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.
Correct Answer:
Verified
Correct Answer:
Verified
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