Question

A 2cm height object is placed at a distance of 32 cm from a concave
mirror the image is real and inverted and 3cm in size. Find the focal
length of the mirror and image distance.​

Answer 1

Answer:

hi dear

concave mirror:

  u = -32 cm       h = 2 cm   h' = -3 cm  image

  m = h'/h = -3/2  

  m = -v/u = -3/2     => v = 3 u /2 = - 48 cm

1/f = 1/ u + 1/v

    = -1/48 - 1/32 = - 5/96

 f = - 19.2 cm

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