how does the laser thermometer measure how hot/cold something is, by just shining on it with a few rays of laserlight?
In: Technology
The laser just helps you pointing it in the right direction. You get the same thermometers without lasars as well. What these thermometers does is to measure the infrared light coming from that area. You may have noticed that hot things tends to glow red, orange or even white depending on its temperature. It still emits light even if it is not red hot, just that it its color is an invisible infrared one. You may feel this as a warm glow from hot things. The sensor in an infrared thermometer is able to measure this infrared light and using this information it can calculate the tempearture.
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