*61. ssm An object is 18 cm in front of a diverging lens that has a focal length of - 12 cm. How far in front of the lens should the object be placed so that the size of its image is reduced by a factor of 2.0?

 

 

So we have two situations, for the first image we have

 

We also can plug into the lens equation

 

 

 

 

Similarly we will have for the second image

 

 

We were informed that

 

So

Solve for image 2

Using lens equation again

 

 

 

Solving for o2

 

 

 

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This page last updated on July 6, 2018