This is a multiple choice question. The de Broglie wavelength of a moving tennis ball is calculated as 1x10^-33. This means that the moving tennis ball A)Diffracts through a narrow slit. B)Does not behave as a particle C)Does not display wave properties D)Is travelling at the speed of light The answer is C and I know this through the process of elimination however, I do not conceptually understand why it is. Can someone please explain?