Edwin was observing a yellow candle flame, his partner Harry claims that the light from the flame originates from excited sodium atoms in the flame. Edwin disagrees with Harry. According to Edwin because the flame is hot radiation, it must be thermal in origin. Who’s point is correct and why?
Question: How can we assert if electron is really elementary ? Might not What is regarded as elementary today be found to be composite tomorrow ? After all, the atoms were the elementary particle of the nineteenth century, could not history repeat itself? Answer: There are many experimental facts which strongly suggest that history will not repeat …
