What is lens formula? State the lens formula for a thin lens with small aperture
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Answer:
The focal length, f, of a lens in air is given by the lensmaker's equation: Here R1 is taken to be positive if the first surface is convex, and negative if the surface is concave. The signs are reversed for the back surface of the lens: R2 is positive if the surface is concave, and negative if it is convex.
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Answer:
1/f=1/v-1/u
Explanation:
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