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
A: stimulated emission
B: microwaves
C: light amplification
D: a maser
举一反三
- In his research at Columbia University Charles Townes worked with all of the following EXCEPT______. A: stimulated B: amplification C: microwaves D: a maser
- In this research at Columbia University, Charles Townes worked with ______. A: stimulated emission B: microwaves C: maser D: stimulated emission and microwaves
- 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.
- 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
- Which of the following schools is not included in Ivy League schools?( ) A: Harvard University B: the University of Pennsylvania C: Columbia University D: University of Cambridge