Infrared radiation

This discovery identified invisible infrared radiation as a form of light that causes heating effects, extending the known electromagnetic spectrum beyond visible light. The work was significant for understanding the nature of electromagnetic waves and led to the development of technologies utilizing infrared.
 William Herschel England 1800 Infrared radiation

This discovery identified invisible infrared radiation as a form of light that causes heating effects, extending the known electromagnetic spectrum beyond visible light. The work was significant for understanding the nature of electromagnetic waves and led to the development of technologies utilizing infrared.