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Converging/diverging mirrors/lenses: conceptual question

Thread starter tensor0910
Start date Nov 20, 2016
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Conceptual

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tensor0910

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Thread starter
Nov 20, 2016

#1

Homework Statement

Im having trouble knowing/remembering when my d_i and d_o should be positive or negative. Does anyone have any tips/advice for this?[/B]

Homework Equations

1/f = 1/d_i + 1/d_o, h_i/h_o = d_i/d_o[/B]

The Attempt at a Solution

No solution. Just a question.[/B]

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andrevdh

Nov 21, 2016

#2

Real images and objects positive, virtual images and objects negative.
Converging lens focal length positive, diverging negative.

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