The plane face of a planoconvex lens is silvered. If 
be the refractive index and 
the radius of curvature of curved surface, then the system will behave like a concave mirror of radius of curvature
a)
b)
c)
d)
The plane face of a planoconvex lens is silvered. If be the refractive index and the radius of curvature of curved surface, then the system will behave like a concave mirror of radius of curvature
a)
b)
c)
d)
Question ID - 152340 | SaraNextGen Top Answer
The plane face of a planoconvex lens is silvered. If be the refractive index and the radius of curvature of curved surface, then the system will behave like a concave mirror of radius of curvature
a)
b)
c)
d)
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The plane face of a planoconvex lens is silvered. If |
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a) |
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b) |
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c) |
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d) |
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1 Answer
127 votes
Answer Key / Explanation : (b) -
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(b) When an object is placed in front of such a lens, the rays are first of all refracted from the convex surface and again refracted from convex surface. Let
Since,
From lens formula
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be focal lengths of convex surface and mirror (plane polished surface) respectively, then effective focal length is
127 votes
Answer Link
127