Question

An achromatic combination of lems is formed by.-

1. one convex lens and one plain mirror.
2. Two convex lenses.
3. Two concave lens.
4. One convex and one concave lens

Answer 1

Hey!!

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➡️An achromatic combinatation of lens is formed by two different types of lens.

One convex and one concave lens.

➡️ Therefore, option (4) is correct.

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Answer 2

Hii

you are welcome in my ans

option 4

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hope it may helps you✊✌️