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Question Number 171044 by sciencestudent last updated on 06/Jun/22
$${Is}\:{the}\:{Light}\:{a}\:{matter}? \\ $$
Commented by mr W last updated on 06/Jun/22
$${does}\:{it}\:{matter}\:{if}\:{it}'{s}\:{not}\:{a}\:{matter}? \\ $$
Commented by peter frank last updated on 07/Jun/22
$$\mathrm{matter}\:\mathrm{is}\:\mathrm{any}\:\mathrm{thing}\:\mathrm{that}\:\mathrm{has}\:\mathrm{mass} \\ $$$$\mathrm{and}\:\mathrm{accupied}\:\mathrm{the}\:\mathrm{space} \\ $$
Commented by wuzie last updated on 07/Jun/22
$$ \\ $$$${matter}\:{is}\:{anything}\:{that}\:{has}\:{mass}\: \\ $$$${and}\:{occupy}\:{space} \\ $$$${light}\:{has}\:{tiny}\:{particles}\:{called} \\ $$$${photons}\:{which}\:{conserves}\:{energy} \\ $$$${according}\:{to}\:{E}={MC}^{\mathrm{2}} \\ $$$${energy}\:{conservesible}\:{at}\:{an}\: \\ $$$${electromagnetic}\:{speed}\:{spectrum} \\ $$$${whuch}\:{photon}\:{has}.\:{to}\:{matter} \\ $$$${which}\:{matter}\:{entails}\:{mass} \\ $$$$ \\ $$
Answered by aleks041103 last updated on 09/Jun/22
$${It}\:{depends}\:{on}\:{how}\:{you}\:{define}\:{matter}. \\ $$$${By}\:{modern}\:{physics}\:{standarts},\:{light}\:{is} \\ $$$${comprised}\:{of}\:{photons}\:−\:{particles}\:{that} \\ $$$${are}\:{excitations}\:{in}\:{the}\:{quantum}\:{bosonic} \\ $$$${EM}\:{field}.\:{That}\:{is}\:{why}\:{we}\:{call}\:{light} \\ $$$$\boldsymbol{{bosonic}}\:\boldsymbol{{matter}}.\:{But}\:{here}\:{the}\:{word} \\ $$$$'{matter}'\:{is}\:{used}\:{for}\:{a}\:{lack}\:{of}\:{a}\:{better}\:{one}. \\ $$$${Usually},\:{by}\:{matter}\:{we}\:{mean}\:{something} \\ $$$${that}\:{can}\:{occupy}\:{some}\:{volume}\:{of}\:{spacetime}. \\ $$$${Bosonic}\:{matter}\:{doesn}'{t}. \\ $$$${On}\:{the}\:{other}\:{hand},\:{fermionic}\:{matter} \\ $$$${does},\:{since}\:{it}\:{obeys}\:{a}\:{Pauli}\:{exclusion} \\ $$$${principle}\:{of}\:{sorts}. \\ $$$${Therefore},\:{if}\:{you}\:{define}\:{matter}\:{as}\: \\ $$$${the}\:{quantity}\:{comprising}\:{anything}, \\ $$$${then}\:{your}\:{question}\:{becomes}\:{trivial}\:−\: \\ $$$${light}\:{is}\:{matter}. \\ $$$${But}\:{if}\:{by}\:{matter}\:{you}\:{mean}\:{sth}\:{that}\: \\ $$$${occupies}\:{some}\:{finite}\:{volume},\:{then} \\ $$$${matter}\:{and}\:{fermionic}\:{matter}\:{become} \\ $$$${the}\:{same}\:{thing}.\:{Then},\:{by}\:{this}\:{definition} \\ $$$${light}\:{is}\:{not}\:{matter}. \\ $$