what are the Sign of conventions to be followed for the applications of refraction at curved surfaces and through lens?write the sign convention for U,V,R1,R2 for concavo-convex lens

what are the Sign of conventions to be followed for the applications o

1.	what are the Sign of conventions to be followed for the applications of refraction at curved surfaces and through lens?write the sign convention for U,V,R1,R2 for concavo-convex lens
Answer» EXPLANATION:REFER to the PHOTOS. ..and MARK me as BRAINLIEST

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what are the Sign of conventions to be followed for the applications of refraction at curved surfaces and through lens?write the sign convention for U,V,R1,R2 for concavo-convex lens​

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what are the Sign of conventions to be followed for the applications of refraction at curved surfaces and through lens?write the sign convention for U,V,R1,R2 for concavo-convex lens