10cm fokas duri wale avtal lens ki shamta gyat kare
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Answer:
10 Dioptre
Explanation:
Shamta = 1 / Fokas Duri (meter)
=> '' = 1 / (10 cm)
Ab;
10 cm = 1 / 10 m
=> shamta = 1 / (1/10) = 10 = 10 D
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