Question

एक उत्तल लेंस की फोकस दूरी 40 से.मी. हैं। लेंस की क्षमता की गणना किजिए​

Answer 1

Answer:

Carbon in its various forms has been known since ancient times in the form of soot, charcoal, graphite and diamonds. Its name is derived from a Latin word “carbo” which means “charcoal”. Ancient cultures did not realize, of course, that these substances were different forms of the same element. Let us explore the versatile nature of carbon.

Explanation:

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