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If I am taking a length, L, and effectively stretching it to a new

length, L+dL. I am interested in the ratio dL/L

Let us say for example L is 2 mm long, and a stretched length of 2+0.2

mm is 2.2 mm. The total ratio of change, dL/L, is 0.2/2, or 0.1

If I take a portion of that length, let's say, between 1.2 and 1.6, and

examine only the length where L is now 0.4. If the same stretching is

applied, does the ratio of dL/L remain the same no matter where I am

looking at a portion of the length?

Thanks