In He-Ne laser the lasing action is produced by_______________?

Related Mcqs:

Ratio of the weight of H-atom to that of an electron is approximately______________?

A. 18.336 B. 1836 C. 18360 D. 183.6...

In hydrogen spectrum which one of the following series lies in the ultraviolet region ?

A. Balmer series B. Pfund series C. Bracket series D. Lymann series...

Which one of following postulate is in accordance with the Rutherfords model ?

A. continuous spectra for atoms B. discrete spectra for atoms C. either continuous nor discrete D. no spectrum...

In an X-ray tube electrons each of charge e are accelerated through V potential difference allowed to hit a metal target. The wavelength of the X-rays emitted is_______________?

A. he/ev B. he/Vc C. eV/h D. impossible to predict...

In normal state of energy the incident high energy photons will be______________?

A. Stimulated B. Absorbed C. Cause X-ray emission D. Cause laser production...