The collecting lens is inserted into the round hole in

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Uploaded: 04.03.2016
Content: 40807.PNG (53,13 kB)
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Description

The collecting lens is inserted into the round hole in an opaque screen. A point source of light is located on the main optical axis of the lens at a distance of 10 cm from it. On the other side of the lens at the same distance from it is put at right angles to the screen axis. The display range of visible light, the diameter of which is less than 2 times the diameter of the lens. Find the focal length of the lens.

Additional information

Task 40807. The solution formulas and the laws used in the decision, the withdrawal of the calculation formula and the answer.
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