My first post... I'm studying physics at school (9th grade) and learned that light has lots of different frequencies above/below visible spectrum. I also know that the speed of light is a constant (300Kps). My question is, does light (all frequencies) travel together like one multilayered wave... leaving and arriving at the same time? I just don't see how the light in the complete spectrum can travel at the same speed. Doesnt make sense. Is sound the same way? I know we have audible frequencies and inaudible. When a sound is struck, does all the sound from 1 Hz to 1MHZ (or whatever the highest is) all move together at the same speed? One final question. When I turn on a light bulb, does it have all of the frequencies, even though I only see certain wavelengths? Is the full spectrum always present in light, even ultraviolet and infrared? Sorry if my questions are too basic. I can't find the answers in my textbook, and I'm a bit introverted so I don't like to ask my teacher in class. THANK YOU!