From the shown figure, name the lens which is plano-concave :

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Solution

The correct option is A D
Plano-concave lens:
The lens is flat on one side and diverging or concave (curved inside) on the other side. These lenses are thinner at centre and thicker at ends.
From the given shapes we can say that lens D is plano-concave lens. Its left side is plane and right side is concave.

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Similar questions

Q. The word "KVPY" is written on a board and viewed through different lenses such that board is at a distance beyond the focal length of the lens. Ignoring magnification effects, consider the following statements.
(I) Image (i) has been viewed from the planar side of a plano-concave lens and image (ii) from the planar side of a plano-convex lens.
(II) Image (i) has been viewed from the concave side of a plano-concave lens and image(ii) from the convex side of a plano-convex lens.
(III) Image(i) has been viewed from the concave side of a plano-concave lens and image (ii) from the planar side of a plano-convex lens.
(IV) Image (i) has been viewed from the planar side of a plano-concave lens and image(ii) from the convex side of a plano-convex lens.
Which of the statements are correct?

In the given figure, the radius of curvature of curved surface for both the planoconvex and plano-concave lens is 10 cm and refractive index for both is 1.5. The location of the final image from the plano-concave lens after all the refractions through lenses is