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AP and TS EAMCET Engineering Model Paper 14
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© examsnet.com
Question : 103
Total: 159
A thin equi convex lens has effective focal length 10cm and refractive index 1.5, when one of its faces is now silvered. Radius of curvature is
10 cm
40 cm
220 cm
15 cm
Validate
Solution:
1
F
=
2
f
1
+
1
f
m
=
4
(
µ
−
1
)
R
+
2
R
1
10
=
4
(
1.5
−
1
)
R
+
2
R
⇒
R
=
40
cm
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