Does the process of rectification alter the frequency of the waveform?

Yes, the process of rectification alters the frequency of the waveform. Rectification converts alternating current (AC) to direct current (DC) by allowing only one half of the AC waveform to pass through, effectively removing the negative half-cycles. This results in a waveform that has a frequency component related to the original AC frequency, but the overall waveform shape and characteristics change, often leading to a ripple frequency that is double the original AC frequency in full-wave rectification.