Final answer:
Increasing the trapezoidal FOV in an optical system widens the imaging area but decreases image resolution.
Step-by-step explanation:
In the context of optics, the trapezoidal field of view (FOV) refers to the shape and size of the area that can be seen through an optical system like a camera or microscope. When the trapezoidal FOV increases, it means that the imaging area becomes wider and covers a larger portion of the scene. However, this increase in FOV comes at a cost - it decreases the resolution of the image. The more the FOV expands, the more stretched or distorted the objects within the image may appear.