Speed of Light in Materials

• The speed of light in Air is $3*$$10^8$
• The speed of light in Carbon Dioxide is $3*$$10^8$
• The speed of light in Diamond is $1.2*$$10^8$
• The speed of light in Glass is $2*$$10^8$
• The speed of light in Glycerol is $2.1*$$10^8$
• The speed of light in Water is $2.3*$$10^8$