Question
Wed March 21, 2012 By:

how are lenses made thin???which type of lenses are used in spectcales???in what way are lenses adjusted in spectacles ???also,state any 4 differences between lens and mirror???

Expert Reply
Wed March 21, 2012
Both convex and concave type of lenses are used in the spectcales. They are adjested according to the problem in the eye of that particular person.
Lenses works on refraction and mirrors works on reflection.
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