Question

An object 2cm in size is placed 30cm in front of a concave mirror of focal length 15cm. What will be the size of the image.

Answer 1

Answer:

the anwer is -2

Explanation:

here h=2

u= -30

v=?

f= -15 [because it is in front of the mirror]

1/f=1/v+1/u

1/v= 1/f-1/u

1/v=1/-15 -{1/-30}

1/v=1/-15+1/30

1/v= [-2+1]/30

v=-30

h'/h=-v/u

h'=-[-30/-30]*h

h'=-1*2

h'= -2

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