A forensic scientist uses thin-layer chromatography (TLC) to analyze a sample of black ink recovered from a suspected forged document.
One of the component dyes separated during the analysis is found to have an RfR_{\text{f}}Rf value of 0.65. The distance from the baseline (start line) to the center of this dye spot is measured as 7.8 cm.
Calculate the distance moved by the solvent front from the baseline.