Which type of lenses are : (a) thinner in the middle than at the edges – InterviewSolution

1.	Which type of lenses are : (a) thinner in the middle than at the edges ? (b) thicker in the middle than at the edges ?
Answer» Which type of lenses are : (a) thinner in the middle than at the edges ? (b) thicker in the middle than at the edges ?

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