Q 1 By saying oscillator I.e atoms in the wall of black body. Do we mean electron ? Because boundary of any atom is electron right.

Q2 My textbook say that quantum is the smallest value of energy that can be emitted or absorbed. On web , it says charge of an electron i.e 1.6*10$^{-19}$C so , is this the smallest value and there can be a value greater than this ?

“The value of one quantum is equal to the magnitude of the charge on an electron”

  • 1
    $\begingroup$ (1). No, they mean an atom. To oscillate, an electron must be a part of an atom. (2). That's charge, not energy. You can't compare them. If it is not clear, wait for 1 kilogram of time and read this again. $\endgroup$ Mar 8 at 10:08
  • $\begingroup$ @IvanNeretin Also , they say smallest value of quantum is charge of electron . That’s the point. Yes,they are different things. I will paste the exact definition. $\endgroup$
    – Rider
    Mar 8 at 10:11
  • $\begingroup$ Please avoid asking multiple loosely correlated questions. Also, make sure you provide a complete citation for the sources you are referencing to (my textbook is meaningless) and write a concise title describing the question as precise as possible. $\endgroup$
    – andselisk
    Mar 8 at 10:39
  • 2
    $\begingroup$ The "classical" smallest value of charge quantum ( as there are many quantised quantities ) is charge of electron. But it is not fully true, if subnucleon structures are considered. As the charge of u quark is +2/3 e and of d quark is -1/3 e. $\endgroup$
    – Poutnik
    Mar 8 at 10:52