Identity area
Reference code
Heritage collection CERN-OBJ-CERN-OBJ-DE-003
Title
lead glass brick
Date(s)
Level of description
Item
Extent and medium
Object
Context area
Name of creator
Biographical history
Repository
Archival history
Immediate source of acquisition or transfer
Content and structure area
Scope and content
When you look through the glass at a picture behind, the picture appears raised up because light is slowed down in the dense glass. It is this density (4.06 gcm-3) that makes lead glass attractive to physicists. The refractive index of the glass is 1.708 at 400nm (violet light), meaning that light travels in the glass at about 58% its normal speed. At CERN, the OPAL detector uses some 12000 blocks of glass like this to measure particle energies.
Appraisal, destruction and scheduling
Accruals
System of arrangement
Conditions of access and use area
Conditions governing access
Public
Conditions governing reproduction
Language of material
Script of material
Language and script notes
Physical characteristics and technical requirements
Only 1 here
Finding aids
Allied materials area
Existence and location of originals
Available, 282.
Existence and location of copies
Related units of description
Notes area
Note
Many of these lead glass bricks are available for donation to museums.
Alternative identifier(s)
CDS number
43835
Object Number
OBJOBJ 0000109
