Final answer:
When changing to a higher magnification on a microscope, it is generally better to increase the light intensity to compensate for the darkening image.
Step-by-step explanation:
When changing to a higher magnification on a microscope, it is generally better to increase the light. As the magnification increases, the length of the objective lens increases and the lens aperture decreases in size, resulting in a darker image. Increasing the light intensity, adjusting the condenser lens, or opening the iris diaphragm can help compensate for the darkening image and create a clearer view.