神探伽俐略既物理問題

說得簡單一點，CO2 laser不會噴出CO2，而是用CO2 molecule來發出激光。激光射到物體，變成熱力。

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CO2 laser有別於CO2
雷射/激光(laser)是一種高能的,集中性高的光束
是由電子受能量激發至高電勢位(受激狀態)
然後回落至低電位
過程中,能量以光子形式放出
那些光子就是雷射
由於高能,集中性高
所以能令人起火

而CO2係氣體分子
當然和光有分別

呢個係利用ＣＯ２產生的鐳射光，唔係ＣＯ２滅火器

The CO2 is completely confined in the laser device and is used to produce the laser beam by excitation of the CO2 gas atoms. The CO2 gas would not touch the object. The object was burnt because of the high intensity of the laser beam, which is a beam of infrared radiation.

In fact, CO2 laser was one of the earliest gas lasers to be developed and is still one of the most useful. CO2 lasers are the highest-power continuous wave lasers that are currently available

The CO2 laser produces a beam of infrared light with the principal wavelength bands centering around 9.4 and 10.6 micrometers. Because of its high power output, CO2 lasers are widely used in industry for cutting and welding purposes.