Physical Science 20 - Jan 15

Today in class we went over the answers to Homework 5.5.  After that we examined some more properties of two dimensional waves.  We spent some time learning how waves refract and how they diffract.  This was all covered on slides 176 -186.  Students were assigned Homework 5.6 and asked to have that completed for Monday.  On Monday we will learn about how these waves interfere with each other.  Have a great weekend everyone!!

Physics 30 - Jan 14

Students wrote their quiz for Lab 4.2 today and then spent the remainder of the class preparing for their in class assignment that is tomorrow.  Make sure you have completed assignments 5.1-5.5 to make sure you are ready for the in class assignment.

Physical Science 20 - Jan 14

Today we started looking at wave behaviour in two dimensions but didn't get much further than talking about how reflection happens.  This is because I spent most of the class checking Homework 5.4 and going over it with the students.  Students will need to know this for the final exam.  We only covered slides 168-175 today.  Tomorrow we will finish up two-dimensional waves.

Physics 30 - Jan 13

Today we finished up the course by looking at the magnetic forces acting on an electric current running in a wire.  These forces are experienced by the wire because the wire produces its own internal magnetic field which is then interacting with the external magnetic field.  This was covered on slides 51-58 in the powerpoint.  Assignment 5.5 was assigned at the end of the period and students will get some more time tomorrow to work on it.  Reminder that tomorrow students have their lab quiz for Lab 4.2.

Physical Science 20 - Jan 13

Today we learned about standing waves and how they are formed.  These are waves that appear to be standing still and are caused by interference between an incident wave and a reflected wave.  The terms nodes and antinodes were introduced and we looked at some formulas that show the relationship between the distance between adjacent nodes and the wavelength, as well as the length of the medium and the wavelength.  Students were to work on Homework 5.4 from yesterday and have that done for tomorrow.  Homework 5.5 deals with standing waves and students will need to have this completed for Friday. The notes today were from slides 159-167.

Physics 30 - Jan 12

Today in class we learned how the magnetic field causes charges to move in a circular path and undergo circular motion.  This was then applied to a type of technology called mass spectroscopy.  This was all covered on slides 42-50 in the powerpoint.  Assignment 5.4 was given at the end of the class.  Tomorrow we will look at the final lesson, how magnetic fields affect charges flowing in a wire.

Physical Science 20 - Jan 12

Today in class we started looking at the wave property of interference.  This involved learning about the principle of superposition and what a resultant wave looks like.  We learned a technique for drawing a resultant wave and just finished an example before the bell went.  This was all covered on slides 141-158.  Homework 5.4 was assigned at the end of class and students will get some time tomorrow to work on it.  Reminder that tomorrow Assignment 5.1 is due.  Students will be handing this in. Tomorrow we will look at specific interference patterns called standing waves.