# User:David J Weiss/Notebook/people/weiss/Lightspeed

• In this lab I calculated the speed o'light using 2 different methods. One of the methods was moving the led in 10 cm increments and going to a distance of 100 cm. In the other method I moved the led in increments of 25 cm and went to a distance of 150 cm. The values I obtained are different, but not too much. The value I obtained using the first method was $\displaystyle 3.285(.025)\times 10^8\frac{meters}{sec}$ witch had and error of about 9.58% witch is not too bad. This was probably due to the fact that there was significant noise in the oscilloscope when we were taking the data and we used the averaging function to try to reduce the amount of noise in the data but then that could put some more error in the data but what can you do. In the second method I obtainment the value of $\displaystyle 2.8767(.0127)\times 10^8\frac{meters}{sec}$ which had a error of about 4.04%. I cant tell witch method is better since the error on each is less than 10% on each and if you were to do the experiments over and over again i would suspect that the error on each would probably reduce and equal out on the two.