Why are de-Broglie waves associated with a moving football not visible?

cbse
dual-nature

#1

Why are de-Broglie waves associated with a moving football not visible? The wavelength A, of a photon and the de-Broglie wavelength of an electron have the same value. Show that the energy of the photon is 2λmc/h times the kinetic energy of the electron , where, m,c and h have their usual meanings.


#2

The magnitude of the wavelength of de-Broglie waves associated with a moving football is extremely
small(λ = h / mv < ${{10}^{-34}}$ m) much less than that of visible region and are therefore not visible.
Wavelength of photon = λ
Energy of photon , ${ E }{ p }$ = hc / λ
Kinetic energy of an electron = , ${ E }
{ e }$ =1/2 m ${{v}^{2}}$