an object 2cm tall is placed on axis of a convex lens of focal length 5cm at a distance of 10cm from the optical centre of the lens find the nature, position and size of the image formed which case of image formation by convex lenses is illustrated by this example?
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Answer:
h
1
=2cm
f=5cm
u=−10m=−1000cm
v
1
−
u
1
=
f
1
v
1
−
−1000
1
=
5
1
v
1
=
5
1
−
1000
1
=
1000
200−1
=
1000
199
v=5.02cm
The image is formed 5.02cm behind the convex lens and is real and inverted.
m=
u
v
=
−1000
5.02
=−0.005
m=
h
1
h
2
=−0.005
2
h
2
=−0.005
h
2
=0.01cm
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