Question

please find and help​

Answer 1

Answer:

size of the image is 8/5 cm

Explanation: ho = 4 cm, u = -15 cm, power = -10 D, hi = ?

Power = 1/f = f = 1/p

f = 1/-10

f = 100/-10    

f = - 10 cm

According to the lens formula:-

1/v - 1/u = 1/f

1/v - 1/-15 = 1/-10

1/v = 1/-10 + 1/-15

1/v = -3 +(-2)/30

1/v = -5 / 30

v = - 6 cm

According to the magnification formula:-

m = hi/ho = v/u

hi/4 = -6/-15

hi = 24/15

hi = 8/5 cm

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