Interference alone cannot produce the complete white light spectrum. Interference occurs when two or more waves superimpose, resulting in constructive or destructive interference patterns. While interference can reveal certain properties of light, such as interference fringes in a double-slit experiment, it does not generate the full spectrum of white light.
White light consists of a broad range of wavelengths that cover the entire visible spectrum, from approximately 400 nanometers (violet) to 700 nanometers (red). Each wavelength corresponds to a different color within this range. When white light passes through a prism or a diffraction grating, it disperses into its constituent colors due to the varying refractive indices or diffraction patterns associated with different wavelengths.
Interference alone cannot generate all the individual wavelengths needed to produce the full spectrum of white light. Interference relies on the superposition of existing wavelengths and cannot generate new wavelengths that are absent. Therefore, to obtain the complete white light spectrum, one must rely on dispersion methods like prisms or diffraction gratings, which separate white light into its constituent colors based on their different wavelengths.