Subject: Re: As this is the Atheist forum...
There is no evidence for anything metaphysical. Until that changes, there is no need to consider it.

In fact, it could be argued that there can never be evidence for the metaphysical (otherwise it would be physical), and so is not within the realm of physics at all. In terms of physics, we understand light (i.e. the EM spectrum) pretty well. Until someone introduces something we don't understand or is inconsistent, we proceed as if there are no doubts. We can only work with the best theories we have at the moment.