2.2. Optical Techniques

Try these first

1. 1.

   What does optical diameter measure?

   Hint

   Relates to how light interacts with particles.

2. 2.

   Name one method for measuring particulate matter.

   Hint

   Think of how you weigh things.

3. 3.

   What is the primary focus of optical techniques?

   • Measurement of sound
   • Measurement of particulate matter
   • Calculation of temperature

   Hint

   Focus on the subject of the monitoring techniques.

4. 4.

   True or False: An aerodynamic diameter is always equivalent to the optical diameter.

   • True
   • False

   Hint

   Think about how size might change based on the measurement method.

5. 5.

   You are tasked with measuring PM in an urban area using both optical and gravimetric methods. Design a study that employs both techniques. Discuss how you would compare and analyze the results.

   Hint

   Consider what variables might influence the results and how you can consolidate them in your analysis.

6. 6.

   Critique the following statement: 'Optical methods are superior to gravimetric methods for particulate measurement.' Provide a balanced viewpoint.

   Hint

   Think about the strengths and weaknesses of each method in different contexts.