Re: Great site

Author: Caroline Hall-Managing Editor
Posted: Feb 8, 2010 12:35PM UTC

> On Feb 07, 2010, Stephanie Chasteen posted:
>
> I was
> very impressed with the quality of information on
> this site, which is appropriate for a wide level of
> learners.

Agreed. These authors have done a fine job of delivering user-friendly materials for both novice learners and people with some background in physics. Thanks for the input, Stephanie.
Caroline Hall, The Physics Front

• 9-12: 10C/H1. As a young man, Albert Einstein, a German scientist, formulated the special theory of relativity, which brought about revolutionary changes in human understanding of nature. Among the counterintuitive ideas of special relativity is that the speed of light is the same for all observers no matter how they or the light source happen to be moving. In addition, nothing can travel faster than the speed of light.
• 9-12: 10C/H3. The special theory of relativity is best known for stating that any form of energy has mass, and that matter itself is a form of energy. Even a tiny amount of matter holds an enormous amount of energy. This relationship is described in the famous relativity equation E = mc2, in which the c in the equation stands for the immense speed of light.
• 9-12: 10C/H4. A decade after Einstein developed the special theory of relativity, he proposed the general theory of relativity, which pictures Newton's gravitational force as a distortion of space and time.
• 9-12: 10C/H5. Einstein's development of the theories of special and general relativity ranks as one of the greatest human accomplishments in all of history. Many predictions from the theories have been confirmed on both atomic and astronomical scales. Still, the search continues for an even more powerful theory of the architecture of the universe.