4/3/2023 0 Comments Diffraction of waves![]() ![]() The above figures shows the diffracted wavefronts. The barriers are replaced with obstacles of different widths and the ‘shadow’ of each obstacle is observed and recorded.The width of the gap is fixed but the frequency of the motor is adjusted.The wavefronts that emerge from the gap are observed and recorded.The barriers are adjusted for different widths of the gap.The speed of the motor is adjusted to produce a train of waves that can be clearly observed on the screen with the help of a stroboscope.A horizontal vibrating beam is used to create plane waves.The legs of the ripple tank are adjusted so that the base of the tank is horizontal.The ripple tank is arranged as shown in Figure.Diffraction of Plane Waves in a Ripple Tank ExperimentĪim: To study the characteristics of diffraction of plane waves in a ripple tank.Īpparatus: Ripple tank with its accessories, stroboscope For smaller gaps and obstacles, the change of direction is more – the spread is bigger.Īmplitude: The amplitude of the diffracted waves is smaller than that of the incident waves. Speed: The speed of the diffracted waves is the same as that of the incident waves.ĭirection: The direction of propagation of the diffracted waves depends on the width of the gaps or obstacles. Wavelength: The wavelength of the diffracted waves is the same as that of the incident waves.įrequency: The frequency of the diffracted waves is the same as that of the incident waves. Diffraction of waves is a phenomenon that refers to the spreading out of waves when they move through a gap or round an obstacle. ![]() This observation can be explained by the diffraction of waves. It is noticed that when the waves passed through the narrow opening between the two concrete barriers, their shape changed. Figure shows a scenery of a fishing village. ![]()
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