Science, asked by Mansii2896, 11 months ago

एक अवतल दर्पण की वक्रता त्रिज्या 20 सेमी है । इसकी फोकस दूरी होगी (क) -20 सेमी (ख) -10 सेमी (ग) +40 सेमी (घ) +10 सेमी

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Answered by sumant73

1

Answer:

correct answer is ( 1) - 20 cm

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