Question

an 9bject of concave mirror is 2 cm is placed at dustance if 29 cm in front of concave mirror of focal length 12cm find size position of image
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Answer 1

An object of height 2 cm is placed at a distance 20 cm in front of a concave mirror of focal length 12 cm. Which of the following is true about image?

Medium

Solution

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Correct option is

D

All the above are true

Size of object h

o

=2cm

Size of the object h

i

=?

Focal length f=−12cm

Object distance u=−20cm

Image distance v=?

Using mirror formula

f

1

=

v

1

+

u

1

−12

1

=

v

1

+

−20

1

v

1

=

60

−5+3

v=−30cm

Magnification (M)=

h

o

h

i

=

u

−v

=

−20

30

=−1.5

h

i

=−1.5×2=−3cm

Image will be real, inverted and magnified.