1 | Glass transmits light, but not sound. | |
2 | She turned around again towards the light coming from the window. | |
3 | Black, no light penetration; Used for drum, package and decoration. | |
4 | Gold can be pounded into a sheet so thin that light passes through it, yet the sheet doesn't crack. | |
5 | The front must fit into the opening like a plug, with no light or gaps visible. |