Dynamic Moiré Effect in Filled Volumetric Rectangular Objects with Refraction

The moiré effect in refractive objects is rarely studied, especially in dynamics. We conducted a theoretical and experimental study of the dynamic moiré effect in rectangular containers with a refractive substance. We generalized the moiré magnification coefficient. The velocity was measured experimentally. Formulas for the moiré magnification and the velocity of moiré patterns in rectangular containers with a refractive substance were obtained. The formulas were analyzed in detail, and numerous special cases were identified. The visual effect of the counter-movement of the moiré patterns was predicted theoretically and observed experimentally. This study is important for understanding the dynamic physical properties of the moiré effect with refraction. In practice, the results can be used to measure refractive indexes or levels, as well as in advertising.