Originally posted by Dasa
Is there any law, rule, acceptance or allowance in science for the phenomena of pure invisibility.
Edit: Meaning it is there..... but you cannot detect it with eyes or instruments..
It depends on what you mean by 'pure invisibility'.
There are particles called neutrinos created by nuclear fusion reactions that interact so weakly with other matter that if you
were to try to stop half the neutrinos emitted from the sun you would need nine light years of lead to do so.
It is possible to create structures that bend light around them so that you can see what's behind them but not actually see
them. These usually only work for pre specified wavelengths and not for all wavelengths at the same time.
And has yet to be demonstrated for visible wavelengths.
There are objects in space that are so dark we can't see them directly and can only detect their presence via their effect on
objects we can see that surround them.
However if you mean an object that doesn't interact with anything in any way and thus could not be detected directly or indirectly
by any test or observation, then the answer is, such an object might exist, but there is no reason to suppose it does or test that
would confirm it.
Thus it would and could not be part of any scientific theory because it would have no effect on any test or result we could see.
It would have no predictive value.
There is no rule or law that says such a thing couldn't exist, in the same way as (and this is where I think you are going) there is no
law that says god can't exist. But there is no evidence for it, no way of testing for it, no predictive value, and thus it wont appear in
any scientific explanation of the world.