MPSC Rajyaseva 2014 CSAT — Question 17
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पंपण प्रक्रीयेचे कमीत कमी प्रमाण ______ मध्ये आवश्यक असते : / Lesser amount of pumping is required in :
a)चतुःस्तरीय लेझर / four level laser✓ Correct
b)त्रिस्तरीय लेझर / three level laser
c)द्विस्तरीय लेझर / two level laser
d)पर्याय क्रमांक (1) आणि (2) / both (1) and (2) require equal pumping
A four-level laser requires a lesser amount of pumping compared to a three-level laser because the lower laser level is above the ground state, emptying rapidly.
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