The light emitted by the LED is incoherent light, and its basic principle is .
A: spontaneous radiation
B: stimulated absorption
C: stimulated radiation
D: spontaneous absorption
A: spontaneous radiation
B: stimulated absorption
C: stimulated radiation
D: spontaneous absorption
举一反三
- The light emitted by the LED is incoherent light, and its basic principle is . A: stimulated absorption B: spontaneous radiation C: stimulated radiation D: spontaneous radiation
- The<br/>three basic processes involved in generating laser include:() A: spontaneous<br/>radiation B: stimulated<br/>emission C: stimulated<br/>absorption D: laser<br/>amplification
- 产生激光（光的受激辐射放大）的四个过程中，最重要的是 A: Pumping B: Spontaneous emission C: Stimulated emission D: Absorption
- Which is NOT the correct description about Laser? A: It stands for Light Amplification by Stimulated Emission. B: It’s a beam of light energy. C: All the light waves in a laser are emitted in the same rhythm. D: The light waves in a laser are of different wavelengths.
- What is the process principle of welding A: laser radiation onto material B: melting of material C: resolidfying of material D: absorption of material