Sunday, March 30, 2014
In a previous post we looked at a couple of interesting sites for teachers. In this post we look at a few more. There are many sites offering tuition of some kind but these are difficult to evaluate and have been omitted for now.
University sites - there are the University of the West Indies Physics Departments at Mona (Jamaica), at St Augustine (Trinidad) and at Cave Hill (Barbados). All are interesting sites to browse around in. There is also the University of Guyana site although there is currently no degree program.
Another interesting item is an article called "Meet 5 world-renowned Caribbean scientists" on Caribbean Current". One is Guyanese (Dr Chang-Yen) and two are physicists. There are of course many more but making a list would be both challenging and contentious.
I also came across this useful physics blog "Science Zone Jamaica".
There are not a lot of Caribbean physics sites but I will keep looking.
Sunday, February 23, 2014
Thursday, January 23, 2014
This theory is part of the CXC CSEC Physics and is used to illustrate the scientific method. This article gives a useful view of the topic and the nature of scientific theories. Here is a short extract:
"...in the late 1700s there was a theory of heat known as caloric. The basic idea of caloric was that it was a fluid that existed within materials. This fluid was self-repellant, meaning it would try to spread out as evenly as possible. We couldn't observe this fluid directly, but the more caloric a material has the greater its temperature.
The basic assumption of a 'heat fluid' doesn't match reality, but the model makes predictions that are correct. In fact the caloric model works as well today as it did in the late 1700s. We don't use it anymore because we have newer models that work better. Kinetic theory makes all the predictions caloric does and more. Kinetic theory even explains how the thermal energy of a material can be approximated as a fluid."
Saturday, December 28, 2013
“As the planet crosses its star, its atmosphere absorbs certain wavelengths of light or colors, while allowing other wavelengths of light to pass through”