Question
Asked Jan 19, 2020
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A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +40.8 cm. Precisely 36.6 cm behind this lens is a concave lens with a focal length f2 = -14.8 cm. The object to be photographed is 3.92 m in front of the objective lens.

(a) What is the lateral magnification of this lens combination?

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Expert Answer

Step 1

The image from the first lens will act as the object of the second.

The distance to the image from the objective lens can be calculated as follows,

Physics homework question answer, step 1, image 1
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Step 2

So the object distance of the concave lens is –(45.55-36.6) = -8.95cm.

Then...

Physics homework question answer, step 2, image 1
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