How do I pass the light through a copper metal or plate? If there is any chemical solution for?
... passing the light through the copper plate and it also need to seen in other side of same copper metal or plate? or:... passing the light throug
... passing the light through the copper plate and it also need to seen in other side of same copper metal or plate?
or:... passing the light through the copper plate and it also need to seen in other side of same copper metal or plate?
or:You can't just assume that everybody knows what you are talking about. You need to explain it.
or:make a hole in it?
