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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

a)

b)

c)

d)


Question ID - 152411 | Toppr 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)

1 Answer - 5876 Votes

3537

Answer Key : (a) -

(a)

Focal length of converging lens  = +10 cm

= -9 cm

From lens formula

Magnification , 10m

 Apparent area of card through lens

  = 10 10  1  1 = 100



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