Explanation:
Filtration is the easiest filtering method used in forensic science, and it is commonly used to extract objects from a mixture by either going through a "top filter" that is like a sieve, collecting any solid particles that can be retrieved and inspected for any incriminatory evidence.
They glance to see whether the density of glass objects found on a suspicious matching glass discovered at a scene of the crime. When it does, the evidence indicates that the perpetrator was at the scene.