# Example of: Two researchers working on the same question but get opposite conclusions [closed]

• Whether light is made of particles (Newton) or waves (Huygens, Euler)? Whether its vibrations are perpendicular to the plane of polarization (Fresnel), or parallel (Cauchy, Neumann)? Whether an electromagnetic field has momentum density $\smash{\mathbf{D\times B}}$ (Minkowski), or $\smash{\mathbf{E\times H}/c^2}$ (Abraham)? (Such questions, ultimately resolved by being made meaningless, are maybe not of the sort you want.) – Francois Ziegler Oct 2 '18 at 1:43