In a simple microscope, the lens is held at a distance from the eye and the image is formed at the least distance (D) of distinct vision from the eye. What is the magnifying power of the microscope?

Light or visible light is electromagnetic radiation that can be perceived by the human eye. Visible light is usually defined as having wavelengths in the range of 400–700 nanometres, corresponding to frequencies of 750–420 terahertz, between the infrared and the ultraviolet.