Transmission systems transmit tightly focused beams of radio signals from one ground-based microwave transmission antenna to another.â a. âdownlink b. âterrestrial microwave c. âcellular d. âsatellite

Why can blue light and yellow light combine to produce white light? question 17 options: they are both primary colors of light. they absorb each other's wavelengths. because blue, yellow, and white are primary colors. they are complementary colors of light.