Question

❥ An object 2.0 cm high is placed 20cm in front of a concave mirror of focal length

10cm .Find the distance from mirror at which a screen should be placed in order to
obtain sharp image.What will be the size and nature of the image formed?

[ Class 10 ]

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Answer 1

Answer:

hope this will helpful to you...............

Answer 2

Explanation:

Explanation:Size of object h

Explanation:Size of object h o

Explanation: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