Hello!! Can U Explaine Me What is Differaction of Light In Simple and Basic Language???
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You may have heard it said that light travels in straight lines; however this is not always the case! When light passes very small objects that have a size comparable to the wavelength of light being used, then the light tends to get bent slightly as it passes the edge of the object. For example, when we use visible light to look at very small things like bacteria under a microscope it means that the light get bent as it passes the edges of the bacteria and this diffraction results in interference that adversely affects the image quality obtained. This phenomenon places an upper limit of the size of the object that can be resolved given the wavelength of light being used. However, by using light of much shorter wavelengths smaller and smaller objects being seen before the diffraction affects become noticeable again. It can be shown that electrons that have momentum also have a wavelength attributed to them given by: h/mv. The faster these electrons move then the shorter their Debroglie wavelength will be. Electrons accelerated in this way can have very short wavelengths and they can then be used to to see extremely small objects such as virus; this is the principle used in the electron microscope.
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Diffraction is the bending of waves around an obstacle, while interference is the meeting of two waves. For instance, diffraction is what results from a pinhole blocking a wave source, the wave spreads out from that one point. This effect is what creates shadows, regions where the light source is blocked but it is not completely dark. Interference, however, results from two waves colliding with one another undergoing constructive and destructive interference, as in two chords being played.