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কুলম্বের সূত্র সম্পর্কিত গাণিতিক সমস্যা ও সমাধান | অধ্যায়-১০ঃ স্থির তড়িৎ | SSC Physics (Class:09&10)
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সমতল দর্পণ θ কোণে ঘূরালে প্রতিফলিত রশ্মি 2θ কোণে ঘূরে যায় | আলোর প্রতিফলন | SSC Physics(Class:09&10)
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সমতল দর্পণ থেকে লক্ষ্যবস্তুর দূরত্ব ও বিম্বের দূরত্ব সমান । আলোর প্রতিফলন | SSC Physics(Class:09&10)
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