![]() ![]() Where is diffraction taking place in a sunset? W ell, sun appears red because light gets diffracted due to a dust particle in the atmosphere.ĭiffraction of sunset light through trees Well, I guess none of you know about sunset’s reddish appearance is due to diffraction, even though you all have seen sunset and sunrise almost every day unless you are not lazy like me who wakes up in afternoon □ It’s a fact that we all have seen sunset and sunrise but have you all ever thought of it? The reddish appearance of the sun during sunset or sunrise is due to diffraction. This standing wave can stand still and therefore they can be photographed.Īs light travels in the form of a wave we can use two different waves of light and create a standing wave which can be photographed which is what we called as a hologram. Well, when these waves cross each other’s path they create a s tanding wave. This wave is called an interference wave. So what is the big deal about this interference wave? Now imagine if you throw two stones, these will create two different waves on wave crossing each other’s path. You all know that when we throw a stone in steady water it creates a disturbance in the water and it will form some waves. ![]() So here comes the phenomena of diffraction which is used to create holograms. So it nearly impossible to click a photo of light but wait, we all have seen holograms and as we have discussed earlier holograms are the steady 3-D photographs of light. In this case, we are talking about light which travels at the speed of 299 792 458 m/s. You all know whenever you are trying to click a photo with your smartphones, if you are in motion during photoshoot then the image will be blurred because the camera is not able to click steady photo when you are moving. Well, holograms are basically steady photographs of light, but light travels at very high speed and therefore it’s nearly impossible to click a steady photograph of light in a hologram. So now you may be wondering, how diffraction is related to the projection of holograms ? So let’s understand the relation between diffraction and holograms. Hologram projection is also an example of diffraction and you may have seen one. ![]() So, what comes inside your mind when you hear the word ” hologram”, it’s sound cool to me and this phenomena is pretty cool. P.s:- Microscopic pits means where data on a compact disc is stored in binary format (1 or 0) inside a CD. This forms a diffraction grating on the CD mirror surface. These pits are placed in a row of the same width and at equal distance. Recorded data on CD is stored in microscopic pits of different lengths which carries information in the CD. Compact Disc (CD) also resembles the same kind of colours when viewed from different angles. Well, rainbow is formed because water droplets in the atmosphere separate white light into different colours of the rainbow. So almost all of you have seen a rainbow formation on rainy days. Many a time you may have seen diffraction in your life but the problem is we may not notice these little things which are created due to some of the most interesting phenomena of science and diffraction is one of them. Examples and applications of diffraction: Now you know about diffraction and let’s know some of the real-life examples and application of diffraction. All kind of waves such as water waves, gravitational waves and electromagnetic waves all waves in spectrum such as radio waves, x-ray, gamma rays etc. This effect also occurs when light waves travel through a medium of different refractive index. Diffraction is tend to be used when there are many sources of wave and interference is used when only a few wave sources are considered. Now you may have heard about interference and it’s kinda same like diffraction but wait don’t get confused between both of them.ĭiffraction and interference are closely related but they both don’t have an exact meaning. According to this principle, every point on a wave behaves like a source. Phenomena of diffraction is described from the Huygens-Fresnel principle. ![]()
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