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Home » The diagram given below in fig. shows the position of an object OA in relation to a converging lens L whose foci are at F1 and F2.
The diagram given below in fig. shows the position of an object OA in relation to a converging lens L whose foci are at F1 and F2.
Class 10 | ICSE | Physics | Refraction through a Lens | Selina
The diagram given below in fig. shows the position of an object OA in relation to a converging lens L whose foci are at F1 and F2.

(i) Draw two rays to locate the position of the image.

(ii) State the position of the image with reference to the lens.

(iii) Describe the three characteristics of the image.

(iv) Describe how the distance of the image from the lens and the size of the image change as the object move towards F1.

Solution:

(i) Two rays locating the position of the image are –

(ii) The focal length of the lens will be more than twice the image size.

(iii) This image has three characteristics: magnified, real, and inverted.

(iv) As the object moves closer to F1 and is magnified, the picture will shift away from F2. At F1, the image will form at infinity and will be greatly amplified. The image will form on the same side of the object as F1 and will be magnified between F1 and optical centre.

i

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