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Image Formation by Convex Lens

The radii of ...

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The radii of curvature of both the surfaces of a lens are equal. If one of the surfaces is made plane,how doesv the power changes

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Q. A double convex lens has power

P

and same radii of curvature

R

of both the surfaces. The radius of curvature of a surface of a plano - convex lens made of the same material with power

1.5 P

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

Q. Find the radii of curvature of the two surfaces of a convex lens used as a simple microscope, whose maximum magnifying power is

6

. Refractive index of the material of the lens is

μ_{l} = 1.5

and the radii of both spherical surfaces of the lens are equal.

Q. Assertion :Although the surfaces of goggle lenses are curved, it does not have any power. Reason: In case of goggle, both the curved surfaces have equal radii of curvature and have center of curvature on the same side.

Q. Assertion :Although the surface of goggles' lens is curved, it does not have any optical power. Reason: In case of goggles, both the curved surfaces have equal radii of curvature and have centre of curvature on the same side.

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