Question

radius of curvature of convex lens is R1=R2=3cm and refractive index is 1.5cm then find the focal length
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Answer 1

Answer:

focal length is 1 cm

1/f= refractive index -1( 1/r1-1/r2)

Answer 2

Explanation:

this is answer you will get 3 if not I can't say