Which of the following theories confirms the wave nature of light?

The theory that confirms the wave nature of light is the theory of interference, option [B]. This theory illustrates how light waves can superimpose to produce patterns of constructive and destructive interference. When two or more light waves overlap, their amplitudes combine, resulting in an interference pattern. If the waves are in phase, they create constructive interference, leading to brighter regions. If they are out of phase, destructive interference occurs, resulting in darker regions. This behavior is a hallmark of wave phenomena and cannot be explained by particle theories alone. Experiments such as the double-slit experiment famously conducted by Thomas Young in 1801 provide clear evidence of this wave-like behavior of light. By observing the resulting interference patterns, scientists have conclusively demonstrated that light behaves as a wave, supporting the theory of interference as a fundamental explanation for the wave nature of light.