Question

An object is placed at 30cm front of the convex lens focal length 10cm

Answer 1

Explanation:

given that u = -30cm and f= + 10cm

from lens formula

1/f = 1/v - 1/u

1/10 = 1/v - (1/-30)

1/10 = 1/v + 1/30

1/v = 1/10 - 1/30

1/v = (3-1)/30

1/v = 2/30

v = 15cm

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