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Standard X
Physics
Image Formation by Convex Lens
72. Power of ...
Question
72. Power of biconvex lens is 10D ,radius of curvature of each is 10cm.Then n of the material is?
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Q.
The power of a biconvex lens is 10 dioptre and the radius of curvature of each surface is 10 cm. Then the refractive index of the material of the lens is :
Q.
A biconvex lens is made of material of refractive index 1.5 each of radius of curvature of lens surface is 20 cm. The focal length of lens is:
Q.
An equiconvex lens has power
P
and radii of curvature
R
. The radius of curvature of the surface of a plano-convex lens made of the same material with power
1.5
P
is
Q.
The power of a double convex lens of radius of curvature
R
each is
Y
. The power of a plano convex lens of same material and of radius of curvature
2
R
is
Q.
An equi-biconvex lens of focal power
10
D
is cut into two equal parts perpendicular to its axis. If its refractive index is
1.5
, the radius of curvature of one of the parts is
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