27 and 29 April

Today we conducted an index of refraction lab. Some of us pretended to be Darth Vader and destroyed Alderaan.  Other decided to be good and kill cancer. The point of the lab was to measure a substances index of refraction, and then apply that to real life to make a laser bend to hit a target on the wall.

25 April

Today we talked about refraction of light through transparent objects.

Key things to note.

• As light move from less dense materials to denser materials the speed of the photon actually slows down. As it moves back out into the less dense material it speeds up again.
• When light is incident on a transparent object perpendicular to the surface of the object there is no refraction.
• As light moves from less dense to more dense, the ray bends towards the normal. From more to less it will bend away from the normal.
• Each color (wave length/ frequency) refracts differently. blue the most and red the least.
• Snell's law:

n₁sinθ₁=n₂sinθ₂

• n= index of refraction, the ratio between the speed of light in a vacuum and the speed of light in the transparent object.

Homework is Pg. 587 #10-14

22 April

I am sorry, I am absent again today. My back got pretty bad today. I think that I am comfortable letting a sub continue with what needs to be done now. In class I would like for you to draw the ray diagrams for Concave and Convex mirrors on pages 534 and 537 in the book. You will draw figure 14-13 (b & c) and figure 14-14.

Extra Credit 4

Each person who picks out one thing that changes as this wheel moves will get extra credit. You may only pick out one thing and it cannot be picked more than once. We will discuss this phenomenon later. It has to do with light.

I captured this video in Mizzou's physics building. I want to put one in our science display case.

20 April

Hey, we are finally able to use math to investigate mirrors. We still have not finished diagramming convex mirror due to the fact I could not comfortably raise my hand above my head to draw. You should be able to complete the homework now. You are not responsible for any of the diagramming parts of the lesson.

Your Home work: Pg 536 #2-4 & Pg 540 #4-6

Here are the notes so far. (Just click on the pages to zoom)

  

  



18 April

I was not at school today. I hurt my back over the weekend and could not make it out of the chair let alone the house. Instead of being stranded on the floor at school, I decided to relax on the couch at home. Sorry, I made you watch a video.

15 April

Today we continued to create Light diagrams. The main focus was on concave mirrors. Still no homework.

13 April

Today, we will start Light Diagramming. We will draw plane, concave, and convex mirror diagrams.  You will also start doing calculations based on these diagrams. Such as the image height, image distance from the mirror and the magnification of the object. We did not finish Diagramming so I have postponed the homework.

The homework will be Pg. 536 #2-3 and Pg. 540 #4-6

11 April

Today we introduce the concept of Reflection. There was no homework, but we did complete an inclass lab that was due today. The point of the lab was to show that the Angle of Incidence always equals the angle of reflection. I will post notes to this blog at a later time.

8 April

Today we discussed the Bridge competition results. You worked on the laptops to complete your Summary Report. 

You can check out the bridge results on this website: http://www.ozarkelectric.com/mspe/Bridge/2011rank.pdf

6 April

Today we took care of administrative duties for the bridge building competition. I want to say that the bridge products produced this year are the best I've seen so far. The competition went great. Pavel Antonyuk's bridge held 116.64 lbs. I do not know efficiencies yet but I will publish those when I get them (about 2 weeks).

4 April

Today we talked about the E-M Spectrum and how we see. We also showed how colors added and subtracted.

Homework: Pg 523 #1,2,4,5,6