A square card of side length 1mm is being seen through a magnifying lens of focal length 10 cm. The card is placed at a distance of9 cm from the lens. The apparent area of the card through the lens is
a)
b)
c)
d)
A square card of side length 1mm is being seen through a magnifying lens of focal length 10 cm. The card is placed at a distance of9 cm from the lens. The apparent area of the card through the lens is
a)
b)
c)
d)
Question ID - 152411 | SaraNextGen Top Answer
A square card of side length 1mm is being seen through a magnifying lens of focal length 10 cm. The card is placed at a distance of9 cm from the lens. The apparent area of the card through the lens is
a)
b)
c)
d)
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A square card of side length 1mm is being seen through a magnifying lens of focal length 10 cm. The card is placed at a distance of9 cm from the lens. The apparent area of the card through the lens is |
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a) |
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b) |
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c) |
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d) |
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1 Answer
127 votes
Answer Key / Explanation : (a) -
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(a) Focal length of converging lens
From lens formula
Magnification ,
= 10 |
= +10 cm
= -9 cm
10m
Apparent area of card through lens
10 
1 
1 = 100 
127 votes
Answer Link
127