Question

a 5 cm tall object is placed at a distance of 20cm from a concave mirror of focal length 30 cm . Use mirror formula to determine the position and size of the image formed .

Answer 1

here's ur answer buddy

Answer 2

Object height = 5 cm

Object distance = -20 cm

Focal length = 30 cm

MIRROR FORMULA => 1//F = 1/V + 1/U

                                 => 1/30 = 1/V + (-1/20)

                                 => 1/30 + 1/20 = 1/V

                                 =>5/60 = 1/V

                                 => V = 12 cm

hi/ho = - v/u

hi/5 = -(12)/-20

hi = 5 x 12/20

hi = 60/20 => 3 cm

Therefore the image is real and inverted; image distance is 12 cm from mirror , image size is 3 cm

hope this helps

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