Does light intensity change along with frequency? In other words, if you put the same voltage behind a white LED light and a blue LED light will the white light have a higher intensity or just a different frequency? Also, would shining a white light through a very clean thin colored filter change the intensity? Lastly, what would be required to converge different colored lights together? Do I just need a lens, or do I need a prism of some kind? If you have any links to where I can find out information like this, I would be most appreciative. I tried Google but nothing I found answered my questions. Until I get a book on optics, my thanks to whoever can help answer my questions.