Electromagnetic Spectrum Explorer
Light is electromagnetic radiation that travels in waves. Different wavelengths interact with your skin in different ways - from UV rays that trigger vitamin D synthesis to red and infrared light used in photobiomodulation therapy.
Interactive Spectrum
Click on any wavelength band to learn more about its properties
UV light is invisible but powerful. UV-B triggers vitamin D production and melanin synthesis, while UV-A penetrates deeper and contributes to tanning and aging. UV-C is blocked by the atmosphere.
The only light we can see! Different wavelengths appear as different colors. Red light (630-670nm) is particularly interesting for its cellular effects through photobiomodulation.
Invisible to our eyes but felt as warmth. NIR penetrates deepest into tissue, reaching muscles and joints. Used therapeutically for pain relief and healing support.
Key Concepts
Wavelength & Energy
Shorter wavelengths (like UV) carry more energy per photon than longer wavelengths (like infrared). This is why UV can cause DNA damage while infrared primarily produces heat.
Penetration Depth
Longer wavelengths generally penetrate deeper into tissue. Red light reaches 2-3mm while near-infrared can penetrate 5-10mm or more, reaching muscles and joints.
Chromophores
Molecules that absorb specific wavelengths are called chromophores. Melanin absorbs UV, while cytochrome c oxidase in mitochondria absorbs red and near-infrared light.
Therapeutic Windows
Not all wavelengths are equally useful therapeutically. Research has identified optimal wavelengths: UV-B (290-315nm) for vitamin D, red (630-670nm) and NIR (810-850nm) for photobiomodulation.