उस उतल लेंस की क्षमता ज्ञात कीजिए, जिसकी फोकस दूरी 20cm है
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3
Answer:
Nhi ata haii yar
꧁ঔคlt๓ครђঔ꧂
Answered by
3
Answer:
p=1/f
p=1/20/100=100/20=5D
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