Answer: Electron
Notes: In 1905, it was Einstein who suggested the concept of light having a dual nature; particle and wave nature. In a similar way, Louise de Broglie suggested that electron also exhibits a dual nature. Broglie derived a mathematical expression to prove the wave nature of electron along with particle nature. He gave the following relation:- O = h/mv, where O is the wavelength of electron, m is mass of an electron and v is the frequency.
