(76.) The focal length of a convex lens is 18 cm and
the size of the image is a quarter of the object.
The object is situated at a distance of:
(1) 90 cm
O (2) 54 cm
(3) 22.5 cm
O (4) 60 cm
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Answer:
54cm
Explanation:
A point object is situated at a distance of 54cm from the center of the sphere of radius 18cm and refractive index 1.5. Locate the position of the image due to refraction through the sphere.
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