Final answer:
The question examines the possibility of achieving a 250,000x magnification with specific focal lengths in a microscope, which is implausible for conventional light microscopes as they typically magnify up to 1,500 times.
Step-by-step explanation:
The subject of the question relates to the use of microscopes in biology, specifically focusing on the magnification capabilities of these instruments. The viability of a magnification of 250,000 times with the given focal lengths (0.500 cm for the objective lens and 5.00 cm for the eyepiece lens) is under scrutiny. According to provided information, a simple light microscope can magnify up to 1,500 times, while an electron microscope can achieve a magnification up to 1,000,000 times. Within a typical college biology lab, light microscopes are said to magnify up to 400 times. Thus, a magnification of 250,000 from a microscope through lenses with the given focal lengths is highly implausible, as it greatly exceeds the capabilities of standard light microscopes used in educational settings and is in a range more associated with electron microscopes, which operate on a different principle and are not confined by the same focal length limitations.