In 3D space, visualizing a single wavelength of light can be a bit challenging since light is an electromagnetic wave and doesn't have a physical structure that can be directly observed. However, we can use various graphical representations to help understand the properties of light waves.
One common representation is to depict light waves as sinusoidal curves or waves. In this representation, the amplitude of the wave represents the intensity or brightness of the light, while the distance between successive peaks or troughs represents the wavelength of the light.
In a three-dimensional visualization, you can imagine a wave propagating in space. The wave would appear as a series of crests and troughs extending in all directions, much like ripples on the surface of a pond after dropping a stone.
It's important to note that visible light consists of a range of different wavelengths, each corresponding to a specific color. The visible spectrum spans from approximately 400 nanometers (violet-blue) to 700 nanometers (red). So, visualizing a specific wavelength of light would mean focusing on a particular portion of this spectrum and representing its corresponding wave.
Keep in mind that these visualizations are simply representations to help us understand the properties of light waves, and they do not accurately depict the true nature of light at the microscopic level.