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A symmetric doule convex lens is cut in ...

A symmetric doule convex lens is cut in two equal parts by a plane containing the pricipal axis. If the power of the original lens was 4D, the power of a cut lens will be

A

A. 2D

B

B. 3D

C

C. 4D

D

D. 5D

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The correct Answer is:
A
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HC VERMA-GEOMETRICAL OPTICS-Objective -1
  1. A point source of light is placed in front of a plane mirror.

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  2. Total internal reflection can take only if

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  3. In image formation from spherical mirrors, only paraxial rays are cons...

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  4. A point object is placed at a distance of 30cm from a convex mirror of...

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  5. Figure shows two rays A and B being reflected by a mirror and going as...

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  6. The image formed by a concave mirror

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  7. Figure shows three transparent media of refractive indices mu1, mu2 an...

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  8. Four modifications are suggested in the lens formula to incude the eff...

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  9. A double convex lens has two surfaces of equal radii R and refractive ...

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  10. A point source of light is placed at a distance of 2f from a convergin...

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  11. A parallel beam of light is incident on a converging lens parallel to ...

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  12. A symmetric doule convex lens is cut in two equal parts by a plane con...

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  13. A symmetric doule convex lens is cut in two equal parts by a plane per...

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  14. Two concave lenses L1 and L2 are kept in contact with each other. If t...

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  15. A thin lens is made with as material having refractive index mu=1.5. b...

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  16. A convex lens is made of a material having refractive index 1.2. Both ...

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  17. A point object O is placed on the principal axis of a convex lens of f...

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  18. The rays of different colours fail to converge at a point after going ...

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