A point object is placed at a distance of 25 cm from a convex lens. Its focal length is 22 cm. A glass slab of refractive index 1.5 is inserted between the lens and the object, then the image is formed as infinity. Find the thickness of the glass slab (in cm)
A point object is placed at a distance of 25 cm from a convex lens. Its focal length is 22 cm. A glass slab of refractive index 1.5 is inserted between the lens and the object, then the image is formed as infinity. Find the thickness of the glass slab (in cm)
Question ID - 154112 | SaraNextGen Top Answer
A point object is placed at a distance of 25 cm from a convex lens. Its focal length is 22 cm. A glass slab of refractive index 1.5 is inserted between the lens and the object, then the image is formed as infinity. Find the thickness of the glass slab (in cm)
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A point object is placed at a distance of 25 cm from a convex lens. Its focal length is 22 cm. A glass slab of refractive index 1.5 is inserted between the lens and the object, then the image is formed as infinity. Find the thickness of the glass slab (in cm) |
1 Answer
127 votes
Answer Key / Explanation : (9) -
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(9) When object is placed at the focus of the lens, i.e., at 22 cm from the lens, image will be formed at infinity. Shift in the position of object:
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127 votes
Answer Link
127