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what i had planned to do was calculate values for the magnetic permeability and the electric permittivity and plug them into that equation to find the speed of light and it's not going as i planned...

to find the electric permittivity my experiment was using parallel plate capacitors, varying the distance between the plates and measuring the resulting charge between the plates, keeping the voltage constant, but i don't know how i use my results to find the value for Eo, i've tried plotting a graph of Q(charge) against 1/d(distance between plates), 1/d used to get a direct proportion, and finding the gradient of that line, but it's not giving me anything like the true value for Eo...please help?

Also, for calculating Uo, i got together a helmholtz coil and a magnetic sensor(which produces a voltage and 1V = 100mT), for that experiment i varied the current through the helmholtz coil and took not of the voltage and correspoding Teslas, but i do not know what to do with my results to calculate the magnetic permeability of free space...please help?

thanks in advance for any helpful posts.

**1. Homework Statement**

**2. Homework Equations**

**3. The Attempt at a Solution**