Blog 12

A couple of weeks ago, I was heading from Castle building to the Weinberg building.  It was passing period between period 6 and period 1 and it was a cycle 3 schedule.  This was the week before family fair and preparations were going on around campus.  I was late to class by a couple of minutes because I got held up in period 6, so when I was walking to Weinberg there were no students and it was quiet.  There was a forklift coming towards me carrying supplies and it was sounding its siren.  Everything was normal until I passed the forklift and then the pitch of the siren dropped significantly.  This happened because of the doppler effect.  When the forklift was moving towards me, its waves were close together making it have a higher frequency and pitch.  But once the forklift passed, it moving away cause the waves to be more separated decreasing the frequency and pitch.