Translations:Adventist Youth Honors Answer Book/Health and Science/Optics/47/en

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[math]\displaystyle{ f_2 }[/math] should come out as a negative number.

File:Negativelensfocallenght.png
Simple method for determining the focal length of a negative lens.


Another method for measuring focal length of a negative lens:

File:MeasuringNegativeLensFocalLenght.png
Measuring the focal length of a negative lens using measuring microscope. Link->[1]
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