How far must the lens move to focus on this second object

Reference no: EM13711103

Question: A photographer uses his camera, whose lens has a 50mm focal length, to focus on an object 5.0m away. He then wants to take a picture of an object that is 30cm away.

Part A: How far must the lens move to focus on this second object?

I need help to determine how far the lens must move to focus on this second object.

Reference no: EM13711103

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