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
Physics MCQs with Answers
In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?
A. Metal stable state
B. Normal state
C. Inverted population
D. All the above
The metastable state for an atom in laser light is_____________?
A. 10-4 sec
B. 10-5 sec
C. 10-3 sec
D. 10-8 sec
In He-Ne laser the lasing action is produced by_______________?
A. Ne only
B. He-Ne both
C. Electrons of He
D. Electrons Ne
Reflecting mirrors in laser is used to______________?
A. Further stimulation
B. Lasing more
C. For producing more energetic lasers
D. All
The velocity of laser light is___________________?
A. Less than ordinary light
B. More than ordinary light
C. Equal to ordinary light
D. Different for different colours or frequency
Electrons present in p-type material due to thermal pair generation are_____________?
A. majority carriers
B. minority carriers
C. dual carriers
D. blockers
Semi-conductor germanium and silicon are_________________?
A. pentavalent
B. trivalent
C. divalent
D. tetravalent
p-n junction when reversed biased acts as a_______________?
A. capacitor
B. inductor
C. on switch
D. off switch
In n-p-n transistor, p works as______________?
A. collector
B. emitter
C. base
D. any of above
