We started our unit today on physics and the study of light. We talked about the different properties of light and started looking at the speed of light in particular. We learned that light travels very fast in a vacuum (300 million meters per second) and this makes calculating distances of very far objects easy. These distances are called astronomical distances and we went over the definition of a parsec, a light year, and an astronomical unit. We then looked at an exam using these and students were assigned Homework 2.2 to be done for tomorrow.
There is a new powerpoint that students can download to get the notes for this unit. It is found in the Physical Science 20 link on the right and the notes are in the Physics folder called Physics Notes. We went through slides 1-7 today. Tomorrow we will be looking at the rectilinear propagation of light.
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