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. Author manuscript; available in PMC: 2021 Jun 20.
Published in final edited form as: Annu Rev Biochem. 2020 Jun 20;89:443–470. doi: 10.1146/annurev-biochem-013118-111442

Figure 2.

Figure 2

Example of a typical power spectrum of an optically trapped bead. A power spectrum of the fluctuations of an optically trapped bead is shown in blue, and the fit to a Lorentzian function is shown in black. At frequencies below the characteristic corner frequency fc, the spectrum is almost constant. At higher frequencies, it decreases as 1/f 2.