- #1

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I have been doing questions involving focal lenght, but not when the resulting image is a fraction of the original image. i do not know where to start or what equation(s) to use?? :(

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- Thread starter dev-hud
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- #1

- 16

- 0

I have been doing questions involving focal lenght, but not when the resulting image is a fraction of the original image. i do not know where to start or what equation(s) to use?? :(

- #2

berkeman

Mentor

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I have been doing questions involving focal lenght, but not when the resulting image is a fraction of the original image. i do not know where to start or what equation(s) to use?? :(

Use the lens equation. Can you show us what that is? And make a sketch. Could you show us a sketch of the situation?

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