Focal Length: cm-1 Conversion | 0.0759cm-1

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Homework Help Overview

The discussion revolves around the focal length of a concave mirror, specifically addressing the conversion of a value given in inverse centimeters (cm-1) to centimeters (cm).

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to understand the relationship between the focal length and its representation in different units, questioning how to convert from cm-1 to cm. Some participants suggest reviewing the equations used to clarify the misunderstanding regarding the units.

Discussion Status

The discussion is active, with participants exploring the implications of the units involved. Guidance has been offered regarding the interpretation of the value as an inverse focal length, leading to further questioning about the correct conversion process.

Contextual Notes

There appears to be confusion stemming from the original assignment's presentation of focal length in inverse units, which is not typical for focal length measurements. The participants are navigating this unusual setup.

zuzu23
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I am doing an assignment for school about the focal length of a concave mirror.
I found that the focal length for the mirror was 0.0759cm-1
But, how much is that really in terms of cm? So basically, 0.0759cm-1 = ?cm

Thanks ;D
 
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Focal length has units of length, not inverse length. What you probably found was 1/f, not f. Check over your equations and see if that's the problem.
 
Hmm, so if that is 1/f then f would be the inverse of that?
So it would be 0.0759cm? =o
 
No. If 1/f = 0.0759 cm-1, then f = 1/0.0759 cm.
 
Oh, right :redface:

So, 1/0.0759 = 13.18cm

Sorry for my dumb questions, but it's the first time I'm doing this so I'm pretty much confused :blushing:
 

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