20 centimetre focus duri wale uttar lens ki chamta diopter mein hoti hai

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20 centimetre focus duri wale uttar lens ki chamta diopter mein hoti hai

Er Chandra Bhushan December 25, 2021 0

हल:- दिया गया है कि उत्तल लेंस की फोकस दूरी=20 cm=0.2m

तब उत्तल लेंस की क्षमता=1/फोकस दूरी

P=1/f

P=1/0.2m

P=(10/2) D

P=5 D

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