Wave, infrared or heat wave. It was discovered by British scientists, is Sir William Herschel which discovered infrared radiation spectrum (Infrared Ray) in 2009.1800 as Hershel's tracking study of the sun, in the telescope. Requires the use of light filtering lens, which made the colors Hershel. Want to know. In the lens of each color. To change the show the heat of the sun.To find out which is the method of the experiment is very keen you use prism split light. Then the light on the thermometer, which painted black kapao. To vacuum heat even better.You can set the thermometer one apart from the light different, in order to control the experiment show that the different color temperatures higher than the white light. And the temperature rise from purple to red, Hershel, therefore the curiosity.It seems plain solar only. But Hershel's surprise. When it appears that the thermometer, beyond the red light. To measure temperature higher than all, Hershel. Therefore experiments. It is found thatPhysical properties as well as the visible light wave exactly such as refraction, absorb shines through or not through intermediaries, etc., in the first place. You call this light that Calorific rays.The radiation was discovered this was changed the name to "infrared" (the lower red stripe or รังสีใต้แดง) we met every day!
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