Which of the following is a common use for a Phase Contrast Microscope (PCM)?

The Phase Contrast Microscope (PCM) is specifically designed to enhance the visibility of transparent specimens without the need for staining. It is widely used in the field of industrial hygiene and asbestos monitoring because it allows for the effective analysis of airborne asbestos fibers. By utilizing this microscope, technicians can differentiate asbestos fibers from other particles present in an air sample, which is crucial for assessing potential asbestos exposure in various environments.

In the context of air monitoring for asbestos, the PCM enables accurate counting and identification of fibers, facilitating compliance with health and safety regulations. This application is particularly important in environments where asbestos may be disturbed, such as during renovation or demolition activities. The sensitivity and specificity of the PCM make it a vital tool in risk assessment and management related to airborne asbestos exposure.