Final answer:
The DIC microscope uses two beams of light to create a three-dimensional color image by utilizing differences in polarization and enhancing contrast based on the specimen's optical properties.
Step-by-step explanation:
The microscope that uses two beams of light to produce a three-dimensional color image is the Differential Interference Contrast (DIC) microscope. The DIC microscope is equipped with optics that split a beam of light into two beams. These beams then recombine to enhance the contrast of the specimen, resulting in an image that appears three-dimensional and is in color. This method relies on the differences in light waves' polarization, which are affected by the specimen's optical characteristics. DIC microscopes are particularly useful when analyzing specimens with subtle changes in thickness and refractive indices.