લેસર દ્વારા \(6 \times 10^{14}\) Hz આવૃત્તિનો એકરંગી પ્રકાશ ઉત્પન્ન થાય છે. ઉત્સર્જિત પાવર \(4 \times 10^{-3} W\) છે. સ્ત્રોત દ્વારા સરેરાશ પ્રતિ સેકન્ડ કેટલા ફોટોન ઉત્સર્જિત થાય છે? \(\left[h=6.63 \times 10^{-34} Js \right]\)

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.