Project #18234 - The Microscope and drugs

Each of your responses should be at least 3 to 5 sentences in length.

 

Questions:

 

1.      How does a magnifying glass enlarge objects viewed through it?

 

2.      What is the difference between a real image and a virtual image?

 

3.      Why does a compound microscope produce greater magnification than a magnifying glass? How does the eyepiece lens contribute to magnification?

 

4.      What is vertical illumination and under what conditions would a forensic scientist use it to examine a sample? Why is it superior to transmitted illumination under such conditions?

 

5.      How does one calculate the magnification power of a compound microscope?

 

6.      What does numerical aperture (N.A.) measure? What is the difference between a lens with N.A. 1.0 and one with N.A. 0.5?

 

7.      Why might an examiner choose a microscope with a lesser magnification to study a specimen?

 

8.      Briefly describe how a comparison microscope works and what it is used for.

 

9.      How did the comparison microscope make possible modern firearms examination?

 

10.    List two unique characteristics of the stereoscopic microscope.

 

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

 

12.    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?

 

13.    What is the main advantage of the microspectrophotometer?

 

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

 

15.    What is the basic difference between a scanning electron microscope and the other microscopes used in the crime laboratory?

 

Questions:

 

1.      Name two physiological factors and two nondrug factors that influence drug dependence.

 

2.      Under what class of drugs is cocaine listed according to U.S. federal drug laws?  Explain why this classification is pharmacologically incorrect.

 

3.      What is the source of most narcotic drugs? From what plant is this substance derived?

 

4.      What opium derivative is most widely used by addicts? How is it typically administered? Give two reasons why this route of administration is popular.

 

5.      What is the most widely used illicit drug in the United States? Under what class of drugs is it listed and what are its short-term physical and psychological effects at low to moderate doses?

 

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Due By (Pacific Time) 12/01/2013 04:00 pm
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