Question

A convex mirror has a focal length of 20 cm. If object is placed at 30 cm from the lens, find the position of the image. *

1 point

12 cm

24 cm

45 cm

60 cm

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Answer 1

f = 20 cm

u = - 30 cm

1/f = 1/v - 1/u

1/ 20 = 1/v + 1/30

1/v = 1/20 - 1/30

1/v = 3-2/60

1/v = 1/ 60

1/ v = 60 cm

Answer 2

Answer:

60cm is the answer.

Explanation:

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