I understand what u mean but some mass is lost , u c the light (from flame) is emited .. its not a reflection , its a energy. So it has to be something . Light can't be created (conflicts law) so only thing possible thing is HEAT TO LIGHT or MASS TO LIGHT .
Mass to light ??
Some mass is lost in a star when it burns hydrogen to form helium (
4H = 1He at more than 7000 C is'nt) ? .. Any calculation how much is lost ??
Even when u burn something which forms flame with are turning some mass into light right or wherelse is the light comming from...
We take in Oxygen (O2) & give Carbon dioxide (CO2) .
Say a guy somehow does not digest any food or fat for 5 min .. So will lose weight equal to all the "C" lost from his body in that 5 min ??