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JEE Main Physics Class 12 Ray Optics and Optical Instruments Part 1 Questions
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© examsnet.com
Question : 12
Total: 99
For a concave lens of focal length f, the relation between object and image distances u and v, respectively, from its pole can best be represented by (u = v is the reference line) :
[Sep. 05, 2020 (I)]
Validate
Solution:
From lens formula,
1
v
−
1
u
=
1
f
⇒
v
=
u
f
u
+
f
Case-I :
If
v
=
u
⇒
f
+
u
=
f
⇒
u
=
0
Case-II :
If
u
=
∞
then
v
=
f
.
Hence, correct
u
versus
v
graph, that satisfies this condition is (a).
© examsnet.com
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