[[Light]] at high intensity is usually described as an [[Electromagnetic Wave|electromagnetic wave]], consisting of an [[Electric Field|electric]] and a [[Magnetic Field|magnetic field]]. They can oscillate at different [[Frequency|frequencies]]. The human perception of color is depends on the [[Wavelength|wavelength]] (or equivalently on its [[Frequency|frequency]]) of the light. We start to see light at around $380\, \mathrm{nm}$. Light at shorter [[Wavelength|wavelength]] is considered UV (ultraviolet) radiation (and eventually [[X-Ray Radiation| X-ray]] or [[Gamma Radiation| gamma radiation]]). From $380\, \mathrm{nm}$ to $700\, \mathrm{nm}$, we perceive electromagnetic radiation as colored light. The short wavelength regime starts with blue and the longest wavelength that we can see is red. Light at longer wavelength is considered IR (infrared) radiation, also known as heat radiation. ![[visible_radiation.excalidraw.light.svg]] >[!read]- Further Reading >- [[Light]] >- [[Electromagnetic Wave]] >[!ref]- References