They could give these floppies a good second live for viewing the partial phase of the eclips and save some money. Well, you have heard wrong. Check out the definitive article on pp. Nor are CDs, or exposed and developed color slide film. And smoked glass can vary in density of smoking.
Smoked glass is iffy.
So says Ralph Chou, an associate professor of Optometry at University of Waterloo, Ont. Who is also a registrar of the College of Optometrists of Ontario. It comes in a protective plastic sleeve and is quite cleanable and impossible to rip. Unless you drop it you are guaranteed a good, safe, view. Every hotel guest in Aruba was given certified glasses.