A detailed and accurate illustration of light traveling through an optical fiber

A detailed and accurate illustration of light traveling through an optical fiber. The optical fiber is shown as a long, slender, and transparent cylindrical tube with a glowing core, representing the light pathway. The light beams are depicted entering the fiber at one end and reflecting off the inner walls in a clear zigzag pattern, demonstrating total internal reflection. These reflections guide the light smoothly from one end of the fiber to the other without scattering. The core of the fiber glows brightly in soft blue and white hues, while the surrounding cladding is visible but less prominent. The background is dark, enhancing the contrast and making the glowing light path and reflections within the fiber stand out. The image should capture the efficient transmission of light through the fiber, with no loss of intensity along the path.