Forensics Glass Review

What are the physical properties of glass?

• Transparency, flexibility, low melting point

• Transparency, softness, low melting point

• Transparency, hardness, brittleness, high melting point

• Transparency, flexibility, high melting point

What are the different types of glass fractures?

• linear fractures, spiral fractures, and transverse fractures

• tensile fractures, shear fractures, and bending fractures

• compression fractures, torsion fractures, and flexion fractures

• radial fractures, concentric fractures, and impact fractures

How is glass evidence used in forensic investigations?

• Glass evidence is used to determine the type, source, and role of glass in a crime.

• Glass evidence is used to determine the temperature at which the crime was committed.

• Glass evidence is used to identify the fingerprints of the suspect.

• Glass evidence is used to analyze the DNA of the victim.

What are the steps involved in glass comparison and identification?

• Visual examination only

• Comparison with other materials

• Visual examination, measurement of physical properties, chemical analysis, and comparison with reference samples.

• Measurement of chemical properties

Which physical property of glass is used to determine its refractive index?

• hardness

• speed of light

• color

• density

What is the difference between radial and concentric fractures in glass?

• Radial fractures and concentric fractures are the same thing.

• Radial fractures form straight lines, while concentric fractures form circles around the point of impact.

• Radial fractures radiate outward, while concentric fractures form circles around the point of impact.

• Radial fractures form circles around the point of impact, while concentric fractures radiate outward.

How can glass evidence help in determining the point of impact in a crime scene?

• By analyzing the direction and pattern of shattered glass fragments.

• By analyzing the chemical composition of the glass fragments.

• By measuring the thickness of the glass fragments.

• By examining the color of the glass fragments.

What is the significance of density in glass comparison and identification?

• Density is irrelevant in glass comparison and identification.

• Density is only used to determine the color of glass.

• Density is used to determine the temperature resistance of glass.

• Density is used to determine the composition, quality, and type of glass.

How can the presence of tempered glass be identified in a forensic investigation?

• Analyze the chemical composition

• Examine the fracture pattern

• Measure the thickness

• Check for any visible scratches