1 . LASER - এর পূর্রেূপ কী?
- A. Light Amplification by the Solid Emision of Raduation
- B. Light Amplification by the speedy Emission of Rafiation
- C. Light Amplification by the Stimulated Emission of Radiation
- D. Light Amplication by the Special Emission of Radiation
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D ইউনিট : 2013-2014 || জগন্নাথ বিশ্ববিদ্যালয় || 2013
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