Questions from Crime and Investigation

Q: What is the first process that each biometric system must perform?

What is the first process that each biometric system must perform? What does it consist of?

Q: The accompanying figure depicts stress marks on the edge of a glass

The accompanying figure depicts stress marks on the edge of a glass fracture caused by the application of force. If this is a radial fracture, from which side of the glass (left or right) was the forc...

Q: What biometric system process or module performs most of the “heavy

What biometric system process or module performs most of the “heavy lifting” for the system?

Q: Which module is responsible for saving all of the raw data produced

Which module is responsible for saving all of the raw data produced by feature extraction and putting it into a simple and easy to read format for the system?

Q: How does a magnifying glass enlarge objects viewed through it?

How does a magnifying glass enlarge objects viewed through it?

Q: List two unique characteristics of the stereoscopic microscope.

List two unique characteristics of the stereoscopic microscope.

Q: What is the most widely used microscope in the crime laboratory?

What is the most widely used microscope in the crime laboratory? What features make it particularly suited for examination of physical evidence?

Q: What happens to a light beam that passes through a polarizing crystal

What happens to a light beam that passes through a polarizing crystal? What happens when plane-polarized light passes through a second polarizing crystal set perpendicular to the first crystal?

Q: What is the main advantage of the micro-spectrophotometer?

What is the main advantage of the micro-spectrophotometer?

Q: Explain how the infrared micro-spectrophotometer determines the identity of a

Explain how the infrared micro-spectrophotometer determines the identity of a specimen. What type of physical evidence is the micro-spectrophotometer typically used to analyze?