Infrared light was discovered in 1800 by Sir Frederick William Herschel. Herschel, born in Hanover, Germany, decided to investigate the temperature of each color of the spectrum produced when sunlight is passed through a prism.To do this, he used three thermometers whose bulbs he blacked out (the better to absorb heat with).erschel, born in Hanover, Germany, decided to investigate the temperature of each color of the spectrum produced when sunlight is passed through a prism. To do this, he used three thermometers whose bulbs he blacked out (the better to absorb heat with).
Body temperature may be abnormal due to fever (high temperature) or hypothermia (low temperature). A temperature over 38Â°C (100.4Â°F) most often means you have a fever caused by infection or illness. It is generally medically accepted that normal body temperature ranges between 36.5Â°C (97.7Â°F) to 37.5Â°C (99.5Â°F).
Most people state that the normal body temperature is 98.6Â°F (37Â°C). This is an average of normal body temperature measured orally. A person;s temperature may actually be 1Â°F (0.6Â°C) or more above this. Also, your normal body temperature changes by as much as 1Â°F (0.6Â°C) throughout the day.he normal human body temperature is 98.6 degrees Fahrenheit. The normal body of 98.6 degrees Fahrenheit is roughly equal to 37.0 degrees Celsius, while a fever of 102 degrees Fahrenheit is 38.9 degrees on the Celsius scale. 1 person found this useful. Edit.