The capstone audit joins one coherent semiconductor source chain. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
The LED source binds the emitted frequency to the gap
Band gap 6 joules with h equal to 2 joules per hertz gives frequency 3 hertz.
f=hEg=26=3Hz
Five recombinations carry thirty joules in the toy ledger
Five recombinations each use 6 joules, for total energy 30 joules.
5⋅6=30J
The capstone audit follows one source chain
The final accepted bit is 1 because gap, absorption, pairs, doping, junction, diode, and LED sources all match.