Search and compare thousands of words and phrases in British Sign Language (BSL). The largest collection online.
How to sign: having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
"infrared radiation"; "infrared photography";
How to sign: electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
Similiar / Same: infrared light, infrared radiation, infrared emission
Categories: actinic radiation, actinic ray
