Quantum phenomena refers to the behaviors and properties of particles and systems on the quantum scale, which is the scale of atoms and subatomic particles. This field of study explores the strange and counterintuitive nature of quantum mechanics, such as superposition (where particles can exist in multiple states simultaneously), entanglement (where particles become interconnected and share information instantaneously), and wave-particle duality (where particles exhibit both wave-like and particle-like behavior). Quantum phenomena have important implications for a wide range of fields, including physics, chemistry, and information technology, and have led to the development of technologies such as quantum computing and quantum cryptography.