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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.

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.

Calculation on Lee model.Calculations

This category does not contain documents. It was intended to contain legal documentation and formal agreements concerning CERN’s relationship with Switzerland.

This category does not contain documents. It was intended to contain legal documentation and formal agreements concerning CERN’s relationship with Switzerland.

The items in this collection include rights of the Organization and territorial statutes, agreements and contracts (preparation of the collaboration and cooperation agreements concluded with States, International or National organizations), litigation, insurance, intellectual property (legal advice on technology transfer activities).

The items in this collection include rights of the Organization and territorial statutes, agreements and contracts (preparation of the collaboration and cooperation agreements concluded with States, International or National organizations), litigation, insurance, intellectual property (legal advice on technology transfer activities).