Archive for August 2012

S(light)ly confusing…

August 26, 2012

In our studies of light so far, we have review the basic ideas of light transmission, including the ray and wave models (link to a prior post on this topic here. READ IT!), and the ways light traveling as a wave can create interference patterns, and the amazing interactions of diffraction (link to a prior post here. READ IT NOW!).

You need to understand how diffraction works, and to help you with your preparation for your outcome, here is a simulation that will help you explore diffraction phenomena – you must take your time to explore how the factors of wavelength (colour), slit width, slit separation and distance from screen interact to affect “fringe width” – the distance between maxima on the projection screen. You may wish to use your explorations in the simulation to augment and clarify your notes on your summary pages. Remember that you may not include general points of theory or examples unconnected to the context provided on those sheets (Pages from Outcome.)


Gettin’ Energetic!

August 25, 2012

We’ve done a lot of study into energy this semester. We are working through our STELR books (link to PDF), and have looked at the idea of Global Warming, Energy storage and types of energy, Efficiency of conversion of energy from one type to another and we’ve done quite a few experiments.

You should be getting the idea that this is all about energy by now – how energy is used, how energy is produced, how energy can be converted into different forms and how energy can be lost when it is changed from one type to another.

Some of you saw this really clearly when you worked with the first big experiment, looking at how we can produce energy. Perhaps when you saw the bright lights shining on the solar panel gave enough energy to light up a small bulb, or perhaps when you saw the big fan (on high) could turn the wind turbine to make enough electricity to run a small fan…


Electromagnetic Induction

August 7, 2012

This is a placeholder post. It will be updated after the outcome with preparation summary information for the exam.

Here is the powerpoint file: VU4ELECTRICPOWER2012