Final answer:
The question regarding the increase in resolution in the magnification mode of image intensifiers in terms of lp/mm cannot be accurately answered as it is typically not relevant to the resolving power parameters of standard light microscopy, which has a theoretical resolution limit of -0.2 μm. Instead, microscope resolving power is influenced by several factors including the numerical aperture and the quality of lenses.
Step-by-step explanation:
When the magnification mode is used, the increase in image intensifier resolution is assessed in terms of line pairs per millimeter (lp/mm), which reflects the resolving power of the microscope. However, the specific values for the increase from the basal resolution to the enhanced resolution when using an image intensifier are not mentioned in standard microscopy texts. Lp/mm ratings are usually associated with radiography and not light microscopy, and the improvement in resolution would largely depend on the design and quality of the image intensifier itself.
Normal light microscopes can magnify up to about 1500 times with a theoretical resolution limit of -0.2 μm due to the diffraction limit of light. Resolving power, or resolution, is pivotal in microscopy as it is the microscope's ability to distinguish two adjacent structures as separate. Microscope objectives and lenses play significant roles in determining the magnifying power and resolution of an image; with factors such as numerical aperture (NA) and magnification directly influencing this. Electron microscopes, which utilize a shorter wavelength, are capable of much higher resolutions and magnifications up to about 1,000,000 times.