You are looking down onto the surface of a tray of water. Here water waves travel through an opening about the same size as the wavelength and change their direction. Likewise sunsets are orange because when the sun is on the horizon the path the light travels to reach us passes through more atmosphere and even more violet/blue is removed. The sun looks a little more yellow than it really is because the violet/blue part of the spectrum has been removed (scattered out in other directions). Violet and a little blue light is scattered but since our eyes are not as sensitive to violet we see the blue. The sky is blue because clusters of nitrogen and oxygen molecules (which make up most of the atmosphere) have resonances at the same frequency of violet light. The wave is first absorbed and then re-emitted in all directions (or sometimes perpendicular to the incident direction). Scatteringis a similar phenomenon that occurs when a wave interacts with an object that has a resonance frequency the same as the wave frequency. We only notice diffraction when the opening or object is close to the size of the wavelength, so to see diffraction of light it needs to pass through a much smaller opening than a doorway. Sound diffraction is usually not visible, but it is audible through walls or other solid objects.\)). A common example of diffraction of light is looking at an object that is partially immersed in water, where the object appears to be in a different place. Dave King/Dorling Kindersley/Getty Images. ![]() There are various other examples of diffraction grating present in nature that are. This is mainly due to the diffraction of light from the meat fibers. Luncheon meat appears to be a little iridescent.
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