Question #162614

The distance between an object and its upright image is 20.0cm. If the magnification is 0.50, what is the focal length of the lens being used to form the image?


1
Expert's answer
2021-03-18T14:05:35-0400

Magnification

M=ff−u0.50=ff−20.0f=−20cmM=\frac{f}{f-u}\\0.50=\frac{f}{f-20.0}\\f=-20cm


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