#davisson-germer

How did Davisson–Germer actually confirm de Broglie's wavelength at 54 V, and why can't we see a cricket ball diffract?

Study-planner girl with a doubt that doesn't fit into a planner. 😅 De Broglie: \lambda = h/p . For an electron accelerated through V volts, I know \lambda = \dfrac{1.227}{\sqrt{V}} nm. For V = 54 this gives 0.167 nm, and