Question

A 2cm high object is placed at 20 cm in front of a concave mirror of focal

length 10cm.Find the position,size and the nature of the image formed.

(20cm,2cm,real and inverted)​

Answer 1

Answer:

1/ f = 1/v + 1/u

f = -10 cm

u = -20 cm

v = ?

1/v = 1/f - 1/u

1/v = 1/-10 + 1/20

1/v = -1/ 10 + 1/ 20

1/v = -2 +1 / 20

1/v = -1/ 20

v = -20 cm

m = h'/h = -v/u

h'/2 = 20/ -20

h' = -2 cm

the position of the image is 20 cm in front of the mirror. The size of the image is -2 cm and the nature of the image is real and inverted.

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