The diagram shows two pulses, each with a length of m, traveling toward each other at equal speed. What is the resulting pulse when the meet? A. 0m B. 4m downward C. 4m upward D. 8m upward​

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.