Physics: How much is cm-1?

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

1 Answer

  • 1 decade ago
    Favorite Answer

    cm^(-1) written with the -1 as a power indicates that the units are 1 / cm.

    Are you sure it's not 1 / f = 0.0759 cm^(-1)?

    That would make sense, and taking the reciprocal:

    f = 1 / 0.0759 = 13.2 cm.

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