Lucy Liang edited Abstract.tex  over 8 years ago

Commit id: b300c2df240cabfe3f4ee44883ab75042ebe3290

deletions | additions      

       

\begin{Abstract}  In order to find Two fundamental noises, Johnson noise and shot noise, are investigated in this experiment. The Johnson noise which is  theBoltzmann constant, we used measurements of  voltage fluctuations across a resistor that arose from the random motion of electrons electrons. It was measured across different resistances and at different bandwidths  at room temperature. We also wanted to find the charge of an electron. To do this, we took measurements of the size of random fluctuations temperature, resulting  in current produced by an illuminated photo-diode, this demonstrated that electric change is quantized and allowed us to find the value a calculation  ofe. We performed the Johnson Noise Experiment in order to find  the Boltzman Constant: $1.38064852 Boltzmann constant of $1.46  \cdot 10^{-23} \textrm{ m}^2 \textrm{ kg} \textrm{ s}^{-2} \textrm{ K}^{-1}$. We performed The shot noise occurs due to  the Shot Noise Experiment quantization of charge, and was measured by varying current  inorder to find  the system, with which we calculated the electron  charge ofan electron:  $1.64 \cdot 10^{-19} \pm 2.1 \cdot 10^{-26} \textrm{C}$. After performing both experiments, we found $1.46 They agree quite well with the accepted values of $1.38064852  \cdot 10^{-23} \textrm{ m}^2 \textrm{ kg} \textrm{ s}^{-2} \textrm{ K}^{-1}$ for our Johnson Noise K}^{-1}$,  and $1.64 \cdot 10^{-19} \textrm{C}$ for Shot Noise. the Boltzmann constant and electron charge respectively. Errors are discussed.  \end{Abstract}