Forensic Science Glass

Glass

a hard, amophus, transparent material made by heating a mixture of sand and other activities

Amorphus

without shape or form

Density

the ratio of mass to volume

Becke Line

the line created as refracted light becomes concentrated around the edges of a glass fragment

Obsidian

volcanic glass

Soda-lime glass

the most common glass, inexpensive and easy

Leaded glass

glass containing lead oxide

Tempered glass

glass which is strengthened by introducing stress through rapid heating and cooling of the glass surface

Laminated glass

two sheets of ordinary glass bonded together with a plastic film

Radial fracture

a crack in the glass that extends outward like the spoke of a wheel

Concentric fracture

a crack in the glass from a rough circle around the point of impact

Refraction

the change in the direction of light as it changes speed when moving from one substance into another

Refraction index

a measure of how light bends as it passes from one substance to another

Silicon dioxide

the chemical name for silica

normal line

a line drawn perpendicular to the interface surface of two different media

Lime

what is added wo prevent the glass from becoming permeable in water

soda

added to reduce the melting point

exit holes

the larger of the holes made from a bullet

entrance holes

the smaller of the holes made from a bullet

Sand

what is the main ingredient of glass

Crystal stemware

what is made of leaded glass

side windows

which windows in autos are made from tempered glass

wider on the exit side

when a bullet penetrates a panel of glass the crater is