An achromatic combination of lenses is f...

An achromatic combination of lenses is formed by joining

2 convex lens

1 convex, 1 concave lens

2 concave lenses

1 convex and 1 plane mirror

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The correct Answer is:

A, C

An achromatic doubled should satisfy the conditiaon `(w_(1))/(f_1)+(w_(2))/(f_(2))=0`

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