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Monday, June 10, 2019
टॉर्च से किस प्रकार के प्रकाश पुंज की प्राप्ति होती है ?
(A) समांतर प्रकाशपुंज
(B) संसृत प्रकाशपुंज
(C) अपसृत प्रकाशपुंज
(D) सभी कथन सत्य है
Ans (B)
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