Welcome to Science Buddies! This is an excellent topic for a science project. I think you are doing this project from the Science Buddies website. http://www.sciencebuddies.org/science-f ... #procedure
I’m sure that the laws of physics have not changed, so there must be a reasonable explanation for your results. Perhaps you could do an additional experiment or two to explain your discrepant results. Here are some suggestions that might identify the source of the problem:
In the video, the presenter showed that a specific color of light does not pass through a filter with the same color, but does pass through filters of other colors. The results appear to show that a red filter, for example, adsorbs other colors of light, but allows red light to be transmitted. It sounds like you are seeing light transmitted through all of the filters.
Here are some possible things to check:
1. Are you using laser lights? Check with the manufacturer to make sure that the lights emit only a single wavelength of light. If the light source is white light, then it would produce all different wavelengths of light and would be transmitted through any color of filter.
2. What type of gel filter are you using? In the video, the filters appears to be fairly thick. Try using two or more layers to see if this will change the results. What type of gel colors are you using?
If these suggestions do not help, then please explain again exactly what you have done to obtain your results.
Please note that in science fair projects results are empirical. If you obtain unexpected results, you need to report your actual results and data. However, you do need to explain the results in your discussion and conclusion section.
Please post again and let us know what you find.