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Nathanael A. Fortune added textbf_Please_compare_your_description__.tex
over 8 years ago
Commit id: 1afc219ab8a003b1bba192224ab938aa91667426
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\textbf{Please compare your description of Johnson Noise and Shot Noise below with the short description provided you in the getting started instructions for this lab (reprinted below): }
\begin{quote}
By measuring Johnson noise --- the fluctuating voltage that arises due to the random walk motion of electrons in a resistor (even when current isn't flowing through it) ---- as a function of temperature and frequency ``bandwidth'', we can determine Boltzmann's constant $k_B$, the fundamental constant connecting temperature $T$ to energy $k_B T$.
\end{quote}
\begin{quote}
By measuring Shot noise --- the fluctuations in a measured current of electrons due to quantization of charge --- we can determine the fundamental unit of charge $e$ (the charge on an electron).
\end{quote}
\begin{quote}
Who would have thought you could discover fundamental physics from simple ``noise?'' That's pretty neat!
\end{quote}
Notice how this version succinctly describes what Johnson noise and Shot noise are, what we need to measure (and as a function of what variables), and what we aim to determine from the measurement (for example, values for fundamental constants of physics $k_B$ and $e$).
