Light and Matter: Waves and Particles

Light isn't just a wave, it's also a particle, and this discovery changed physics

forever. When scientists shot light at metal surfaces, electrons literally

flew out, but only if the light frequency was high enough. Bright light didn't

matter, only the color did. Einstein explained this by saying light travels in tiny

packets called photons, each carrying specific energy. This is why red light won't trigger

your security system but ultraviolet will. But here's the wildest part: electrons

also behave like waves. Scientists proved this by shooting electrons through

crystals and watching them create wave patterns, just like light does.