Definition: Aberration is a phenomenon in which the observed state does not match with the true state, and it can be due to various factors such as external influences, internal error, or even pure coincidence. When an observer measures something that is inconsistent with their expectations, they call it aberrative. Abeirating can also refer to the process of reducing or eliminating aberrations in a system or measurement. It involves manipulating variables such as temperature, pressure, or frequency to produce a result closer to what we expect, and this can be done experimentally or numerically. One example of aberration is when an electron microscope is used to magnify a sample of gold at high magnification, causing the image to appear distorted due to diffraction. This distortion results in a false impression of the actual shape of the gold particles. Similarly, the aberration of sound waves in a loudspeaker can cause the sound to be distorted, resulting in a false impression. In summary, aberration is a phenomenon that occurs when the observed state does not match with the true state. It refers to reduced or eliminated accuracy and can occur due to external factors, internal error, or pure coincidence.

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