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प्रश्न
The magnification by a lens is +0.5. Name the lens and state how are u and v related?
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उत्तर
Magnification = +0.5
m = `v/u`
0.5 = `v/u`
v = 0.5u
Given that an object's distance from the lens is positive, the lens is concave.
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संबंधित प्रश्न
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An erect, magnified, and a virtual image is formed when an object is placed between the optical centre and principal focus of a lens.
(i) Name the lens.
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