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aloha users!!
____________
answer only if you know and can give proper explanation.
( question-3 )
◆◆ give answer + explanation◆◆
____________________________
thank you
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Since, convex lens is the one that converges,
The answer is gonna be of that.
Now, let's check which of the convex lenses' power is more:
(1) F= 20 cm, P = 1/20 = 0.05 D
(2) F = 10 cm, P=1/10 = 0.10 D
Since the power of the convex lens with 10 cm of focal length is more, it converges Ray's more than the 20 cm one.
Hence, your answer is option (2)
Thus the answer must be option 2.
Convex lens of focal length 10 cm.