• Did you know? Two years after de Broglie's "particles can be waves" idea, Davisson and Germer practically showed it!
• They shot electrons at nickel and saw them diffract, just like waves.
• Nobel Prize Alert! This experiment helped de Broglie win the 1929 Nobel Prize.

• Wanna see electrons act wavy? Aim them at some graphite.

• These electrons, coming from a heated cathode, speed up, reaching nearly 10% of light speed. Vroom!

• Expected: If electrons were plain old particles, they'd make a bright spot on a screen.

• Reality Check: They create rings on the screen – a sure sign of interference (and of them acting like waves).

Real-world analogy: It's like tossing a pebble into a pond and seeing ripples spread out!

The graphite film is like a chaotic jigsaw of small crystals, each diffracting the electron beams in every which way, creating that "ringy" pattern.

• By tweaking the electron-accelerating voltage, you can change their speed and thus their wave nature.
• Lower voltage = slower electrons = longer wavelength. This makes the rings spread out more!

• When electrons gain energy (KE), they move faster.
• According to de Broglie's genius formula: λ = ph​

           where λ is the wavelength and p is momentum.

• Neutron moving at 2.5 × 10³ m/s = 1.6 × 10⁻¹⁰ m wavelength (atom-sized!).
• Electron accelerated with 500V = 5.5 × 10⁻¹¹ m wavelength.