Who discovered the concept of the wave-particle duality of light?

Who discovered the phenomenon of superconductivity?

Who discovered the concept of the speed of light?

Who discovered the phenomenon of electromagnetic waves?

Who discovered the law of reflection of light?

Who discovered the law of the conservation of energy-momentum?

Who discovered the concept of the strong nuclear force?

Who discovered the concept of the weak nuclear force?

Who discovered the phenomenon of diffraction of light?

Who discovered the phenomenon of the photoconductivity?