11. A 5cm tall object is placed perpendicular to the principal axis of a convex lens of focal
length 20 cm. The distance of the object from the lens is 30 cm. Find the:
(1) position
(11) nature
(111) size of the image formed.
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Answer:
The size of the image is 10 cm and the image is real and inverted
Explanation:
Given that,
Height of object h = 5 cm
Focal length f = 20 cm
The distance of the object u = -30 cm
Using lens's formula
The image is formed at 60 cm on the other side from the lens.
The magnification is
The image is real, inverted .
Size of the image,
Hence, The size of the image is 10 cm and the image is real and inverted.
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