Question

c)
An object is placed at a distance of 10 cm from optical centre of a
convex lens of focal length 15 cm. Draw a labelled ray diagram to
show the formation of image in this case.​

Answer 1

Answer:

position =same side of lens, enlarged =size, nature =virtual and erect

Answer 2

$i=-30\ cm$ negative sign denotes that the image is formed on the same side of the object and is virtual erect and magnified as we can see from the schematic.

Explanation:

Given:

• distance of the object from the optical center of the convex lens, $o=10\ cm$

• focal length of the lens, $f=15\ m$

Now the distance of the image formed:

$\frac{1}{f}=\frac{1}{o}+\frac{1}{i}$

$\frac{1}{15}=\frac{1}{10}+\frac{1}{i}$

$i=-30\ cm$ negative sign denotes that the image is formed on the same side of the object and is virtual erect and magnified as we can see from the schematic.

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TOPIC: image between the focus and optical center of the convex lens

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