What term describes evidence that cannot be seen without a microscope?

The term that describes evidence that cannot be seen without a microscope is "microscopic evidence." This type of evidence refers to particles or materials that are too small to be perceived by the naked eye and therefore require magnification for observation. Microscopic evidence can include items such as hairs, fibers, pollen, and certain types of fingerprints, all of which can have significant value in investigations.

This classification is crucial in forensic science, as it helps technicians and investigators to identify and analyze trace evidence that might be pivotal in linking a suspect to a crime scene. The recognition of microscopic evidence emphasizes the importance of proper collection and preservation techniques, as obtaining this evidence can be complex and requires careful handling to maintain its integrity for examination.

In contrast, physical evidence covers a broader range of tangible items that may include visible objects such as weapons or clothing. Macroscopic evidence refers to items or characteristics identifiable without magnification, while biological evidence typically involves organic material derived from living organisms, which may or may not be microscopic. Understanding these distinctions enhances the ability to categorize and analyze evidence effectively in a forensic context.