Question

of an object of length 2 cm is placed at a distance
of 20 im away from a concave mirror of focal
length 15cm. find the position ,size and nature
of image









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Answer 1

Answer:

Size of object h0=2cm

Size of the object hi=?

Focal length f=−12cm

Object distance u=−20cm

Image distance v=?

Using mirror formula

1/f=1/v+1/u

1/-12=1/v+1/-20

v=-30cm

Magnification= v/u= 30/-20

H1= 1.5x2= 3cm

Image will be real, inverted and magnified.....