Chladni's Figures

Explanation of Chladni's Figures :-

To make Chladni's figures , we place the centre of any metal or glass plate on any vertical rod due to which the centre of plate becomes a node .

Now we spread fine sand uniformly on the surface of plate . After it , we grip one end of this plate (N in figure) with our fingers tightly . This point will also be considered as node .

Now we take a bow (violin bow) and place it at one end of the metallic plate (A in figure) and then move this bow on the surface of the plate , due to which , this point becomes an anti-node . The bow will not move to and fro , it will be picked up at the end point and then again place at the initial point N and then move again on the surface .

Now , due to the vibrations occurred by bow, after some time , the fine sand spreader on the metal or glass plate will get a symmetrical figure which shows the nodal lines formed by stationary waves .

If we grip the plate from other points and do the same process again , then we get different types of figures .

Important points about Chladni's Figures :

• "The figures that are obtained by the vibration of bow on metallic plate are known as Chladni's Figures ".

• Chladni's Figures are useful in the construction of the various music instruments.

• In some cases Diaphgrams and Membrane are also used in place of bow. 

• By loading the Diaphgrams at different points , we can change the position of nodal line and hence we change the frequency of sound produced by it .

• By using this method , the natural frequency of microphone can be increased or decreased with a great amount so that the resonance will not be produce by frequency of sound .

• Similarly the membrane of Tabla is loaded by black paint at its surface to change the frequency of sound produced by it .

This was the complete explanation and knowledge about Chladni's Figures . Hope that it was helpful to you and you liked it . 

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