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Renu Phogat • 1.50K Points
Master Physics

Q. प्रकाश किरण पुंज जो अत्यंत दिशिक हो, कहलाती है

(A) मेसर
(B) लेसर
(C) इरेजर
(D) ग्रेजर
Correct Answer - Option (B)

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