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एक खगोलीय दूरदर्शी की आवर्धन क्षमता 10 है व नेत्रिका की फोकस दूरी 20 सेमी है। अभिदृश्यक लेंस की फोकस दूरी होगी-

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एक खगोलीय दूरदर्शी की आवर्धन क्षमता 10 है व नेत्रिका की फोकस दूरी 20 सेमी है। अभिदृश्यक लेंस की फोकस दूरी होगी-
A. 2 सेमी
B. 200 सेमी
C. `1/2` सेमी
D. `1/200` सेमी
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Correct Answer - B
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