A flame (from Latin flamma) is the visible, gaseous part of a fire. It is caused by a highly exothermic reaction taking place in a thin zone.
Thermonuclear flames
Flames do not need to be driven only by chemical energy release. In stars, subsonic burning fronts driven by burning light nuclei (like carbon or helium) to heavy nuclei (up to iron group) propagate as flames.
Kabul
2018-8-18 20:19:59
唔好 check flame
Flame 中文係焰，已經偏離咗
Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition.
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遊物語
2018-8-18 20:29:22
...標顯係「暫時已知最高溫嘅火係咩顏色 ?」
唔係就係講緊Visual Part of Fire，即係Flame?
而且wiki有講係有Thermonuclear flames依個概念
Kabul
2018-8-18 20:29:26
其實唔重要
Microscopic 同 macroscopic 只係兩個睇事物嘅角度嚟
唔存在所謂因果關係
原來燒 metal 又唔同講法
Flame test 用嘅係另一個機制：emission spectrum
主要原理係，粒 electron 加熱之後跳咗上高 D 嘅 energy orbital
當粒 electron 跌去比較低嘅 energy orbital 就會釋放某個 wavelength 嘅 photon
原本得一粒 atom 嘅時候，咁搞只會放 discrete 嘅 spectrum
但係當好多 atoms 聚埋一齊，由於某 D electrons 會喺短時間之內透過 vibration 損耗能量
所以唔同 electrons 夾埋會有好多唔同嘅 energy level
令到出嚟嘅係一個 continuous 嘅 spectrum
入到我哋肉眼後變成嗰隻 metal 嘅 characteristic color