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Assertion Lens formula can be applied on...

Assertion Lens formula can be applied only for thin lenses.
Reason For thick lenses one cannot find image position.

A

If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

B

If both Assertion and Reason are true but Reason is not correct explanation of Assertion.

C

If Assertion is true but Reason is false.

D

If Assertion is false but Reason is true.

Text Solution

Verified by Experts

The correct Answer is:
C
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Assertion:- A thick lens show more chromatic abberration comparision to thin lens. Reason:- Thick lens behave as many thin lenses.

Two convex lenses f focal length 20 cm each are placed coaxially with a separation of 60 cm between them. find the image of a distance object formed by the combination by a. using thin les formula separately for the two lenses and b. using the equivalent lens. Note that although the combination forms a real image of as distance object on the other side, it is equivalent to as diverging lens as far as the locatiion of the final image is concerned.

Consider the following statements regarding the real images formed with a converging lens. । -Real images can be seen only if the image is projected onto the screen .(2)The real image can be seen only from the same side of the lens as that on which the object is positioned. (3)Real images produced by converging lenses are not only laterally but also longitudinally inverted as with mirrors. Which of the above statement/statements is/are incorrect?

Two convex lenses of focal length 20cm each are placed coaxially with a separation of 60cm between them. Find the image of a distant object formed by the combination by: a. Using thin lense formul separately for the two lenses, and b. Using the equivalent lens. Note that although the combination forms a real image of a distant object on the other side, it is equivalent to a diverging lens as far as the location of the final image is concerned.

Obtain the formula for combined focal length of two thin lenses in contact, taking one divergent and the other convergent.

Assertion:Image formed by concave lens is not always virtual. Reason:Image formed by a lens is real if the image is formed in the direction of ray of light with respect to the lens.

Assertion : The images formed by total internal reflections are much brighter than those formed by mirrorrs or lenses. Reason : There is no loss of intensity in total internal reflection.

DC PANDEY-RAY OPTICS-medical entrance special format question
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  14. Assertion: A hollow lens behaves like a thin glass plate. Reason: Po...

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  15. Assertion: If angle of incidence in case of a prism is gradually incre...

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  16. Regarding the power of an optical instruments match the following two ...

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  17. Magnitude of focal lengths of a convex lens, a concave lens, a convex ...

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  18. Focal length of a biconvex lens is f. Regarding the focal lengths and ...

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