Final answer:
The property where some dyes emit infrared light after being exposed to blue-green light is known as Infrared luminescence, which involves the absorption of light causing electrons to jump to higher energy states and emit photons of a different color when they return to their ground state.
Step-by-step explanation:
The property exhibited by some dyes that emit infrared luminescence when exposed to blue-green light is known as Infrared luminescence. This occurs because the energy absorbed by the dye causes electrons to jump to higher energy states and emit photons of a different color as they return to their ground state. While fluorescent dyes absorb light of one wavelength and emit light of another, in the context of infrared luminescence, the emitted light is in the infrared spectrum, which is longer in wavelength and lower in energy than the visible light absorbed.
For example, a dye such as Texas red can be excited by blue light but emit red light in the visible spectrum, while other dyes might absorb visible light and emit infrared radiation. In general, if a material emits light (including infrared) after a delay following absorption, the process is known as phosphorescence. However, the term infrared luminescence is specific to the emission of infrared light after absorbing light in the visible range.