Another question on geometrical optics

  • #1
I have my question,doubt and solution in the attachment that followed.Thanks for anybody that spend some time on this question.Sorry to say that the file format is *.zip .
 

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  • #2
ehild
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Sanosuke Sagara said:
I have my question,doubt and solution in the attachment that followed.Thanks for anybody that spend some time on this question.Sorry to say that the file format is *.zip .

Well, the object distance is always positive if it is a real object, either it is in front of a concave or convex surface. The object image can be negative only when an image serves as an object for a second lens or surface and falls behind it. "In front" and "behind" is determined by the first lens. Where the object is, that is the "front side".

ehild
 

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