Question

an object 4 cm in size is placed at a distance of 25 cm
from concave mirror of focal length 15cm. Find
the position, nature ond height of the image.​

Answer 1

1/f=1/v+1/u

1/-15=1/v+1/-25

1/-15+1/25=1/v

-5+3/75=1/v

-2/75=1/v

75/-2=v

-37.5=v

m= h'/h=-v/u

h'/4=-(-37.5)/-25

h'/4=37.5/-25

h'=4×37.5/-25

h'=150/-25=-6

nature of the image is real and inverted

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