White light is not associated with a single wavelength but is rather a combination of all visible wavelengths of light. When white light passes through a prism or is dispersed in any other way, it separates into its constituent colors, forming a continuous spectrum of colors from red to violet.
While red light has a longer wavelength compared to other colors in the visible spectrum, it is not accurate to say that it is the "strongest" wavelength or the first emitted from white light. White light is composed of a broad range of wavelengths, and each color within the spectrum has its own unique characteristics.
If you're looking for a single wavelength that is closest to white light, it would be difficult to pinpoint a specific one. However, if you consider the average wavelength of white light, which is determined by the distribution of all the wavelengths present, it falls somewhere in the middle of the visible spectrum, around green or yellow-green.