For numericals based on lens maker's formula,can u tell me how to identify -ve and+ve radius of curvature (means R1 and R2) FOR DOUBLE CONCAVE AND CONVEX LENS.
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Consider a concave lens:
R= -ve(image is formed on the LHS of Cartesian plane)
If it is a concave lens:
R= +ve(Image is formed on the RHS of Cartesian plane)
R= -ve(image is formed on the LHS of Cartesian plane)
If it is a concave lens:
R= +ve(Image is formed on the RHS of Cartesian plane)
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