In this research at Columbia University, Charles Townes worked with ______.
A: stimulated emission
B: microwaves
C: maser
D: stimulated emission and microwaves
A: stimulated emission
B: microwaves
C: maser
D: stimulated emission and microwaves
举一反三
- In his research at Columbia University, Charles Townes worked with all of the following EXCEPT _________. A: stimulated emission B: microwaves C: light amplification D: a maser
- In his research at Columbia University Charles Townes worked with all of the following EXCEPT______. A: stimulated B: amplification C: microwaves D: a maser
- 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
- 正电子发射断层扫描 A: proton emission tomography B: positron emission geography C: positron emission tomography