Final answer:
All types of electromagnetic waves, including yellow, red, ultraviolet, and infrared light, travel at the same constant speed of light, which is about 3 × 108 m/s in a vacuum, irrespective of their different wavelengths and frequencies.
Step-by-step explanation:
The question concerns the speed of different types of electromagnetic waves, specifically light at various wavelengths in the spectrum. When light and other electromagnetic waves are traveling through a vacuum, they all move at the same constant speed of light - approximately 300,000 kilometers per second (3 × 108 m/s), which is the fastest speed possible in the universe. This speed remains constant regardless of the light’s wavelength or whether the light is yellow (610 nm), red (690 nm), ultraviolet (290 nm), or infrared (850 nm).
Based on this understanding, the answer to which of the listed types of light has the greatest speed is that they all have the same speed in a vacuum. The different colors of light, like yellow, red, ultraviolet, and infrared, differ in properties such as wavelength and frequency, but not speed. For example, red light has the lowest frequency and the longest wavelength, and violet light has the highest frequency and the shortest wavelength, yet their speed is identical when not interacting with matter.