Comment Remarkable transparency... (Score 1) 31
On a simple read, the article's phrasing would suggest graphene is very transparent. However, graphene is an exceedingly opaque substance. It's"remarkable transparancy" is remarkable primarily because it's really not very transparent at all.
That 'transmits 98% of light' is what happens when sending light through just a single-atom-thick layer of graphene.
Photo of single atomic layer: https://en.wikipedia.org/wiki/...
Graphene can be roughly described as a single layer of graphite. Many folk are aware of graphite being very opaque - it is used as a pencil 'lead' in normal wooden pencils. Its stunning opacity is one reason that it works so well to leave visible marks on paper.
More detail if interested: https://en.wikipedia.org/wiki/...