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RESONANCE

       


      Resonance is a very important physical phenomenon
     Imagine  a swinging pendulum.  A 99 cm long pendulum makes one oscillation every two second naturally.  If you push the pendulum every 2 second, it will oscillate with long swing.  Now, the frequency of external force (pushing) matches with pendulum's natural frequency.  Hence it oscillates vigorously.  We say, "Resonance" has occurred here.  Suppose, you push the pendulum every one second or three second, it will only disturb the natural motion of the pendulum and may dampen the pendulum's oscillations.
    The moon revolves around the earth in about a month.  In the same time, the moon spins about itself.  Here frequency of revolution and the frequency of the spin matches and resonance come into play.  That is why, the moon shows the same face to us always.

    We have heard, the opera singer breaking a wine glass just by singing.  If the singer's voice frequency and the glass cup's own frequency equals, the resonance will occur.  The wine glass may shatter.

      If light waves of same frequency superimpose, it will result in a intense light called LASER.

     A circuit of resistor, capacitor and inductor has its own electrical frequency, if the alternating current of same frequency is sent through the circuit, a maximum current will flow through the circuit.  The frequency is known as resonant frequency.  This idea is widely used in electronics.

      Today, MRI scans are widely used in hospitals.  MRI stand for nuclear Magnetic Resonance Imaging.  Main parts of the MRI are computer, powerful magnet, Radio frequency waves.

      Our body is mainly made up of water.  Water in turn contains Hydrogen and Oxygen atoms.  Hydrogen is just a proton (positive charge).  The power magnet aligns the positive protons.  The proton always spins.  If the spinning frequency matches the frequency of radio waves we send, resonance sets in and the protons spin violently.  The computer produces false colour images based on the resonance (not gone into details).  MRI is highly helpful in visualizing even minute details in the body. 

      you can find resonance everywhere in physics

      Note:  Man and woman marry and the resonance mostly occur .Than the marriage will succeed easily.  If one is extrovert, the spouse should also be one.  If man is broad minded in terms of finance, the wife should also embrace his trait.

         

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