# Wave particle duality [duplicate]

Can someone please explain wave particle duality for large bodies? Why don't large bodies exhibit wave like nature for example if I am walking with some momentum, the wavelength associated with me is $$h/p$$ what does this mean?

de Broglie wave length is defined as : $$\lambda _{B}={\frac {h}{p}}$$ So if for example your mass is 60 kg and you are moving with a sports car with a speed of 200 km/h, then your de Broglie wave-length would be on the order of $$10^{-37}$$m. No physical length can be smaller than Plank length which is $$1.616\;229\times 10^{-35}\ \mathrm {m}$$. Thus de Broglie wave lengths for macroscopic big objects means nothing.
• Plugin zero momentum into the formula and you will get $\lambda _{B} = \infty$ - infinite de Broglie wavelength. If you can't detect wave periodicity in space - then this is not a wave at all. Pretty much like circle with infinite radius is not circle at all. Any system with infinite parameter value is un-physical and makes no sense. The only exception to this rule is a singularity in black hole center. However this can also mean that as for now simply we don't have good quantum gravity theory which would resolve infinity issues at black hole center – Agnius Vasiliauskas Sep 14 '19 at 8:40