Understanding Optical Power in Simple Lens Equations

[rambo5330]

Homework Statement

I am given a question with the focal length stated in optical power
i.e 6.7m^-1

what is optical power it is stated that it is = to 1/f

so in the equation 1/p + 1/q = 1/f
is it right to assume that 1/p + 1/q = 6.7
or is it 1/6.7
??

Homework Equations

The Attempt at a Solution

 

[Stonebridge]

Yes, optical power is defined as 1/f for the lens.
Your first assumption is correct.
1/p + 1/q = power of lens