There's not much to go on, so I have to guess.
The phrase "path difference" is one that often pops up in radio or light propagation,
where it's measured in wavelengths (at the operating frequency).
When considering significant digits, there is a difference between 27 and 27.00. If you measured something that was 27, then it means you measured to the tens place. However, a measurement of 27.00 means you measured to the hundreths place. The 27.00 is a more accurate measurement because you are considering lower denominations of the unit.
The unit of measure is the Volt Potential difference is basically electrical "pressure" (an excess of electrons). Volt.....The unit of electric potential. Named after the Italian physicist Alessandro Volta (1745- 1827). The potential difference is the difference in charge at the poles of a current source The volt (symbol: V) is the SI derived unit of electromotive force, commonly called "voltage". It is also the unit for the related but slightly different quantity electric potential difference (also called "electrostatic potential difference"). ... en.wikipedia.org/wiki/Volt
Potential . . .Always measured as a potential difference between two points.The most practical way to do that is with a voltemeter connectedin parallel with any circuit between the two points.Electric current . . .The most practical way to measure current is with an ammeter connectedin series in the path of the current.
Current and it is measured in amps, milliamps or perhaps microamps.
Density is measured in grams per cubic centimetre, or g/cm3. The densest metal on the periodic table is Osmium, closely followed by Iridium, the difference is minute.
difference between shortest path and alternate path
Relation between phase difference and path difference is path difference/wavelength=phase difference/2*pi
'Force' isn't measured in volts. Potential and potential difference are measured in volts.
in wavelength
The path difference is the difference in the physical distance between the two sources to the observer, i.e., the difference in distance travelled from the source to the observer.
A tornado's width is measured at bottom, usually by the width of the damage path.
phase diference=path difference x (360 degrees/wavelength)
'Force' isn't measured in volts. Potential and potential difference are measured in volts.
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Possible parallel earth path/s when measured!
Potential Difference is measured in Volts
volts