Power of a lens

[globy321]

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The power of a lens is P=1/f where f is the focal length. Do you need to convert the focal length to meters if it's given in centimeters?

 

[rjosh33]

The power of a lens is P=1/f where f is the focal length. Do you need to convert the focal length to meters if it's given in centimeters?

Absolutely.

 

[brownbaglunch]

I recommend always converting to base SI units unless the unit cancels completely with itself.