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Class 12
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Ray Optics and Optical Instruments
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Combination of Mirror and Lenses
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A convex lens has focal length 30 cm. If
Question
A convex lens has focal length
3
0
cm. If an object is placed at a distance of
1
5
cm from it then the magnification produced by the lens is?
A
6
.
6
6
B
0
.
5
C
1
D
2
Medium
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Updated on : 2022-09-05
Solution
Verified by Toppr
Correct option is D)
v
1
−
u
1
=
f
1
⇒
v
1
−
−
1
5
1
=
3
0
1
⇒
v
=
−
3
0
m
=
u
v
=
−
1
5
3
0
m
=
−
2
⇒
∣
m
∣
=
2
.
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