Understanding Light Diffraction

What is Diffraction? Diffraction happens when light waves bend or spread out after passing through

a small opening or moving around the edge of an object. ⸻ 📌 Why does this

happen? Diffraction becomes noticeable when the size of the opening (or obstacle)

is similar to or smaller than the wavelength of light. When that happens, light can’t keep

traveling perfectly straight — it spreads out. ⸻ 🌊 Think of light

like waves on water If you place a small stick in water or let water waves pass through a small

gap, the waves start to spread out after the gap. Light waves behave

in a similar way. ⸻ 📚 Huygens’ Principle (simple version) This principle says: