Chapter 15 Part 2

Front

What happens to glass when a bullet passes through it?

Back

A cone-shaped piece of glass is pushed ahead of the bullet, causing the exit hole to be larger than the entrance hole.

Front

Can glass stretch when it is hit?

Back

Yes, glass can stretch slightly when it is hit.

Front

What type of glass can be formed from certain types of sand exposed to extremely high temperatures?

Back

Obsidian glass can be formed from certain types of sand exposed to extremely high temperatures.

Front

What is another name for tempered glass, commonly used in car windows and shower doors?

Back

Safety glass is also known as tempered glass.

Front

What is the halo-like effect called that appears around the edge of glass when the refractive index of the medium is different?

Back

This halo-like effect is called a Becke line.

Front

What is the primary characteristic of safety glass?

Back

Safety glass has improved strength due to being subjected to extreme temperatures or chemical treatments.

Front

What is the difference between the entrance and exit holes made by a bullet in glass?

Back

The exit hole is larger than the entrance hole.

Front

What natural events can lead to the formation of obsidian glass?

Back

Lightning strikes or volcanic eruptions can lead to the formation of obsidian glass.

Front

What is the significance of the Becke line in forensic science?

Back

The Becke line helps in determining the refractive index of glass in relation to its surrounding medium.

Front

How does the structure of glass change when it is tempered?

Back

Tempered glass undergoes processes that increase its strength and resistance to thermal stress.