4.22

Today we started off class with a graded daily question. The question had to do with the speed and period of a wave that's crests pass a pole each second. Then it changes these dimensions and asks for the speed and period of the wave if the two crests were 1.5 meters apart and passed the pole each second. There were multiple correct answers to the daily question. After the daily question we continued to learn about interference. We watched the same video we watched yesterday. The video is so confusing and it is very hard to tell if the wave is bouncing off the other or going through. We learned that whenever two crests or two troughs meet, it is constructive interference. Constructive interference gives off much more amplitude. Waves will always go through each other unless it goes through a different medium. There is no reflection when waves are traveling and collide across the same medium. Destructive interference is when a crest and a trough meet in the same location and they cancel each other out. We looked at a graph and had to pinpoint where there was constructive interference when two waves collided. At points G, J, N, etc. there was constructive interference. We knew this because those were points where a crest was colliding with a crest or a trough was colliding with a trough. The rest that weren't labeled (H) was considered destructive interference. Don't forget that week 2 of the roller coaster project is due this friday. For the rest of class we worked on page 12 and drew waves.