Question

11. Determine how far an object must be placed in front of a converging lens of focal
length 10cm in order to produce an erect image of linear magnification 4.
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Answer 1

Explanation:

answered Aug 5, 2019 by aditya23 (-2,153 points)

f = 10 cm

m = + 4(upright image)

m = v/u = 4

v = 4u

Lens formula: 1/v – 1/u = 1/f

1/4u – 1/u = 1/10

-3/4u = 1/10

u = -7.5 cm

The object must be placed 7.5 cm in front of the converging lens.

Answer 2

Answer:

The answer will be -7.5 cm