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Standard IX
Physics
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the rear face...
Question
the rear face of an equiconvex lens of focal length 30 cm is silvered so that it behacea lika a concave mirror. the focal length of the mirror is options- 1. 7.5 cm 2. 15 cm 3. 30 cm 4. 20 c
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Q.
The rear face of an equiconvex lens of focal length 30 cm is silvered so that if behave like a concave mirror.The focal length of mirror is
(
μ
l
e
n
s
=
3
2
)
Q.
A plano-convex lens when silvered on the plane side behaves like a concave mirror of focal length
30
c
m
. However when silvered on the convex side, it behaves like a concave mirror of focal length
10
c
m
. The refractive index of its material is
Q.
When the plane surface of a planoconvex lens of refractive index
1.5
is silvered, it behaves like a concave mirror of focal length
30
c
m
. When its convex surface is silvered, it will behave like a concave mirror of focal length
Q.
A planoconvex lens, when silvered in the plane side behaves like a concave mirror of focal length
30
cm. However, when silvered on the convex side it behaves like a concave mirror of focal length
10
cm. Then the refrective index of its material will be
Q.
A concave lens of focal length 20 cm placed in contact with a plane mirror acts as a
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