User contributions for 84.120.147.185
For 84.120.147.185 talk block log logs filter log
23 May 2011
- 07:5607:56, 23 May 2011 diff hist +155 Talk:Refraction →Change in the speed of light
- 07:5407:54, 23 May 2011 diff hist +167 Talk:Speed of light →why light slows in a medium: new section