Definition
Diffraction is the bending, spreading, or deviation of waves around the edges of an obstacle or through a narrow opening.
Why It Matters
It proves the wave nature of light and sets physical limits on optical resolution.
Core Concepts
- Diffraction: More pronounced when the opening or obstacle is close to the wavelength of the light. It limits the resolution of optical instruments.
- Constructive: Waves add to create brightness.
- Destructive: Waves cancel to create darkness.