The human body Your eye perceives light of different wavelengths as different colors. Your body perceives infrared light as heat.
Light is a wave .
It can behave like a particle. A photon has energy, wavelength, and frequency properties. Light's wavelength can be measured using a tool called a spectroscope or a spectrometer. As an object heats up, it gets brighter because it emits more electromagnetic radiation. The dominant color or wavelength of the emitted radiation changes with temperature.