Question

A 5 cm long object is placed at a distance of 15 cm from a convex lens of focal lenght 10 cm .Find the position and lenght of the image.​

Answer 1

Answer:

Explanation:

H(obj) = 5cm : f = 10cm ; u =  -15cm

1/f = 1/v - 1/u

1/10 = 1/v + 1/15

1/v =  1/30       == v = 30cm

m = Hi/Ho = v/u

     = H = 30 /-15 *5

     ==    Hi = -10cm (below)

the image is real , inverted and magnified

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