2. (क) एक अवतल दर्पण के मुख्य अक्ष पर ध्रुव से 36 सेमी की दूरी
पर स्थित वस्तु का प्रतिबिम्ब वस्तु के ही ऊपर बनता है। दर्पण की फोकस
दूरी परिकलित कीजिए।
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Twins are two offspring produced by the same pregnancy. Twins can be either monozygotic, meaning that they develop from one zygote, which splits and forms two embryos, or dizygotic, meaning that each twin develops from a separate egg and each egg is fertilized by its own sperm cell.
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