Unit 9 - Waves

Today in class we talked about unit 9 and learned a BUNCH of new vocabulary, most of which blew my mind and left me brain dead for the rest of class. Unit 9 is covering waves such as light waves, heat waves, how they move, how they form themselves, why they form themselves like this, and lastly different parts of these waves. Lets go over the basics, Waves are disturbances through matter or space, these are also accompanied with energy transferring. We also talked about how frequencies of waves change, a frequency is the number of cycles that can happen/pass in one second. When writing an equation for frequency the unit is going to be Hertz or Hz. Towards the end of class we all got to see something crazy cool. There was a fancy strobe light that only flashed when the object passed infront of it and because of that we were able to read words on a fan when it was on high speed! I thought it was one of the coolest things I've ever seen in my life, no joke! Because of this we were able to clearly see the nodes, anti-nodes and loops. 

This picture of my spring represents a wave, as you move the spring back and forth the energy will go down in a wave like manner. Once it hits the other end it will come back towards you as a wave. Think of this as echo location, the thing bats use. Bats send out waves and as the waves rebound back towards them they are able to tell where prey is. This is just like that, waves rebound back towards their original starting point, but if you are to far away they wont come back and they will dissipate.