An object is placed 10 cm from a convex lens of focal length 20 cm. What is the lateral magnification of the object? A) 0.50
B) 1.0
C) 1.5
D) 2.0
E) 2.5

D 2

Explanation:

Given that

Distance of the object, u = 10 cm

Focal distance of the object, f = 20 cm

Then again, we know from the lens formula that

1/f = 1/u + 1/v

Then we solve for the distance of the image, v

1/20 = 1/10 + 1/v

1/v = 1/20 - 1/10

1/v = (1 - 2) /20

1/v = -1/20

v = -20 cm

Lateral magnification is given as

m = -v/u,

So we input our values

m = - -20/10

m = 20/10

m = 2

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i think it’s a. this is because if they measured the mass of something with a mass of 150g, then their final answer would have to be approximately 150g. though all of their answers are almost 150, rosa and tran have the closest answers (or the exact answer) to the accurate one.