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Lens Maker's Formula

A biconvex th...

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A biconvex thick lens is constructed with glass (ref. index = 1.50). Each of the surface has a radius of 10cm and the thickness at the middle is 5cm. Locate the image of an object placed far away from the lens

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Q. A biconvex thick lens is constructed with glass (μ = 1.50). Each of the surfaces has a radius of 10 cm and the thickness at the middle is 5 cm. Locate the image of an object placed far away from the lens.

Q. An equiconvex lens is made from

μ = 1.5

r = 20 c m

5 c m

thick in the middle. Find the position of the image far away from the lens.

Q. A point object is placed on the principal axis of a convex lens (f = 15 cm) at a distance of 30 cm from it. A glass plate (μ = 1.50) of thickness 1 cm is placed on the other side of the lens perpendicular to the axis. Locate the image of the point object.

Q. A point object is placed at a distance of 25 cm from a convex lens of focal length 20 cm. If a glass slab of thickness t and refractive index 1.5 is inserted between the lens and the object the image is formed at infinity. The thickness t is

Q. A pin is placed

10

cm in front of a convex lens of focal length

20

cm and refractive index

1.5

. The surface of the lens farther away from the pin is silvered and has a radius of curvature of

22

cm. How far from the lens is the final image formed?

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