We worked on our solutions to Ch 23 P: 7-15 today after a few comments about the ray diagrams in Assignments 3 and 4.
Assignment:
We presented our ray diagrams and showed with our mirrors real situations that our ray diagrams represent. The idea was to help you related what we see with our eyes to what ray diagrams tell us. One big part of that is to figure out where you would have to be in order to see the image produced by the mirror. In some ways this can seem easy, but in other ways it can stretch our capacities.
Assignment:
The first image of a black hole has been captured by telescopes around the world working in concert. It was released to the public today. How do we make and interpret ray diagrams? That's the question of the day. The keys are
Assignment:
After reviewing a bit about the Law of Reflection and images formed by flat mirrors, we began to deal with curved mirrors. Although the text deals mainly with spherical mirrors, we will deal mainly with parabolic mirrors, because parabolic mirrors have true foci.
We learned what is meant by the principal axis and the focus today. In fact, we put the Sun on the principal axis of our large parabolic mirror and found the focus with a piece of cardboard. It was not a good day for the cardboard, was it! We learned how to draw the paralled ray and the focal ray from an object point and their reflections as well. The point from which the reflected rays diverge is the image location. Tomorrow we will consider ALL the other rays that leave the object point, too. That will help to make clear how an image forms. Assignment: The questions du jour for the ray model of light were:
Assignment:
After our quiz about the electromagnetic wave model of light we began to consider Earth and Moon's shadows as well as how our visual systems decide where objects are located. It turns out that a "ray model' of light explains those things well.
Tomorrow we will see how the ray model of light can be used to explain images produced by flat mirrors! We wrapped up our examination of EM waves today and reviewed a bit in preparation for tomorrow's quiz.
Assignment:
Today we debriefed our observations from yesterday's polarized light activity. Then we presented our solutions to our assigned problems.
Assignment:
Polarized light is all around us, and today we took a look at several examples of it. You should know the orientation of polarized light produced by sunglasses and by reflection from vertical and horizontal surfaces, for example. Do you?
Assignment:
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Physics IIMr. Swackhamer Archives
May 2019
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