Question

our lens manufacturer can only produce lenses with diopter 1d, 2d, 3d, and 4d. if you want to focus incoming parallel light rays 0.2 m behind the last lens, which two lenses should you purchase?

Answer 1

Two lenses that should be purchased are lenses with the power of 1d and 4d or 2d and 3d.

We need to know about the power of the lens to solve this problem. Lens power can be defined as the ability of the optical device to see. It can be represented by a dioptre unit. The relaxed power formula is

P = 1 / f

where P is the power of the lens in dioptre, and f is the focal length.

From the question above, the given parameter is

f = 0.2 m

By substituting the given parameters, we can calculate the power of the lens

P = 1 / f

P = 1 / 0.2

P = 5d

The total diopter should be 5d.

For more on lens at: brainly.com/question/15445779

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