Question

an object of size 1.5cm is placed at a distance 30cm. from a concave mirror of focal length 20cm calculate the position size and nature image​

Answer 1

Object Size = -1.5 cm

Object Distance = -30 cm

Focal Length = -20 cm

1/u+ 1/v = 1/f

1/-30 + 1/v = 1/-20

1/v = 1/-20 + 1/30 = -1/60

v = -60

Ho/H = -(V/U)

-60/H = -(-60/-30)

-1.5/H = -2

H = 3 cm

Hence,the Image formed is Real,Enlarged and Erect.

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