This lecture delves into the wave-particle duality of quantum objects, as illustrated by the two-slit Young experiment. It explores Max Born's rule, which defines the probability density of measuring a quantum object. The lecture also covers the standardization of wave functions, the uncertainty principle, and the Gaussian wave packet state. Emphasizing the orthodox interpretation of quantum physics, it discusses the complementary nature of wave and particle behaviors, and the limitations in determining the position and momentum of particles. Through examples and theoretical explanations, the instructor sheds light on the complex interplay between waves and particles in the quantum realm.