Optical density is a measure of how much a material can attenuate or absorb light as it passes through. It relates to the amount of light that is transmitted versus absorbed, and it plays a significant role in determining a material's refractive index, dispersion, and absorption characteristics. A higher optical density indicates that less light is transmitted, suggesting greater absorption and influence on how light behaves when interacting with the material.
congrats on reading the definition of Optical Density. now let's actually learn it.