Hence as the proportion between angle and arc length is constant we can say that. As circumference C 2pr L th 2pr 2p L th r. The length of the object in this reference frame is observed length and is labeled Dl.
C_ len 2 times sqrt r 2 d 2 C len.
This blog post provides the formulas and an Excel spreadsheet for calculating the wavelengths for each 20 MHz channel center frequency in the 24 GHz and 5 GHz bands. Theory of the equation. Both Dl 0 and Dl are measured in meters m. Two versions are given for this length calculation one using the length in metres and the other for the length in inches.