Hi all,

Here, specificly I want to introduce one of my programs which visually represents the Relativity theory...

You enter the initial length, mass and time of the object and the speed...it calculates the length, mass and time in that speed with a downloadable visual representation.

you can try it here:
http://www.dreamstube.com/php/relativity/

enjoy and please let me know about your feedback.

I wrote this VB.NET application about two years ago. It simulates drawing with a magnet and iron filings. You can save your drawings in a text file and reload it later.

I developed this application with having electromagnetics concepts in mind so actual formulas are used to calculate the speed and direction of the filings.

The first step is defining the canvas. Here you set the width and height of the canvas and also the width and number of filings.

Then you have the canvas ready for you with loaded iron filings as follows:

You can adjust the magnet strength by clicking on the circles (buttons) on the top left. Darker circle means stronget magnet. At the end you can save your awesome painting and reload it again in future. You can download the executable here.

Here, I'm demonstrating a flash animation which shows the relation between initial velocity, friction and gravity.

I developed these programs in my mother language. To help you use it, I added english labels in the images.

 You can try it here.

Here you can find another version of this application.

If you are interested in optical physics, this post is for you!

There are 4 flash animations here which demonstrate the relation between the object and its image size and direction using lens and mirror. To try this applications, simply drag the object (Arrow) and see the image moving based on the lens / mirrors type.

• BiConvex lens
• BiConcave lens
• Convex mirror
• Concave mirror