Question: night vision devices use which type of waves

title: Night vision
text: Night - useful spectral range techniques can sense radiation that is invisible to a human observer . Human vision is confined to a small portion of the electromagnetic spectrum called visible light . Enhanced spectral range allows the viewer to take advantage of non-visible sources of electromagnetic radiation ( such as near - infrared or ultraviolet radiation ) . Some animals such as the mantis shrimp can see using much more of the infrared and / or ultraviolet spectrum than humans . Spectrum 

Answer: answer: Night - useful spectral range techniques can sense radiation that is invisible to a human observer. Enhanced spectral range allows the viewer to take advantage of non-visible sources of electromagnetic radiation ( such as near - infrared or ultraviolet radiation ) .