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चार महीने का बच्चा कैसे बना अरब़पति

चार महीने का बच्चा कैसे बना अरब़पति? जन्म के सिर्फ चार माह बाद यदि कोई बच्चा अरबपति बन जाए तो इसे उसकी किस्मत ही कहेंगे। भारत के एकाग्रह रोहन मूर्ति नाम के बच्चे की किस्मत कुछ इसी प्रकार चमकी है। देश की दूसरी सबसे बड़ी आइटी कम्पनी इंफोसिस के फाउंडर नारायण मूर्ति ने सोमवार अपने चार महीने के पोते एकाग्रह मूर्ति को 240 करोड़ रूपए के शेयरों की हिस्सेदारी का तोहफा देकर उसे शायद देश का सबसे कम उम्र का अरबपति बना दिया है। BSE की फाइलिंग के अनुसार इंफोसिस में अब एकाग्रह रोहन की 15 लाख शेयरों की हिस्सेदारी हो गई है। इसका मतलब अब एकाग्रह रोहन इंफोसिस का 0.04% का हिस्सेदार है। शेयरों के स्थानान्तरण के बाद नारायण मूर्ति के पास कम्पनी के कुल शेयरों का 0.36% हिस्सा बचा है। जिस समय नारायण मूर्ति द्वारा अपने पोते को शेयर देने की खबर बाई उस समय इंफोसिस के शेयरों में गिरावट देखने को मिल रही थी। एकाग्रह रोहन, नारायण मूर्ति तथा सुधा मूर्ति के बेट रोहन मूर्ति और उनकी पत्नि अर्पणा कृष्णन का बेटा है। आपको यह पता होगा कि नोरायण मूर्ति ने अपनी पत्नि सुधा मूर्ति से 10 हजार रूपए उधार लेकर 1981 में इंफोसिस क
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Resonators | Cavity resonator | Microwave electronics

Resonators

Resonators

  • It is found that any distributed transmission line of length λg/2 will resonate, if it is shorted or open at one end. This is the principle of resonators.
  • A resonator is actually a device or a system that exhibits resonance or resonant behaviour. It means it naturally oscillates at some frequencies with greater amplitude than at other frequencies.
  • The frequencies at which the device oscillate are known as resonant frequencies.
  • The oscillations produced in a resonator can be either electromagnetic resonance or mechanical resonance.
  • The resonators are used to generate either waves of specific frequencies or to select specific frequencies from a signal.
  • The musical instruments use acoustic resonators and it produce sound waves of specific tones.

    • Resonance

  • The resonance is a phenomenon that consists of a given system, which is driven by another vibrating system or by external forces to oscillate with greater amplitude at some particular preferential frequencies.
  • The resonance occurs, when a system is able to store and easily transfer energy between two or more different storage modes.

Cavity Resonator

  • The cavity resonators are devices, which is closely related to waveguides and have the practical importance.
  • If the waveguide is limited by closing the ends of a finite length of the tube in conducting surfaces then it is known as cavity resonator.
  • The cavity resonators produced by placing end faces on finite length of cylindrical tube waveguides are known as cylindrical cavity resonators.
  • There are two types of cylindrical cavity resonator, one is rectangular and another is circular. It depends on the cross section of the cavity resonator.

Cylindrical cavity resonator

  • In cylindrical cavity resonator we assume that
    • The end faces of cylindrical cavity resonators are plane, and perpendicular to the axis of cavity.
    • The walls of cylindrical cavity resonators are perfectly conducting.
    • The transverse cross sectional shape and size of it are uniform.
    • The cavity of cylindrical cavity resonator is filled with loss-less non-conducting medium.
  • In cylindrical cavity resonator, electromagnetic wave propagates along the axis of the cavity and they reflects back and forth by the plane end faces.
  • Both waves i.e., incident wave and reflected wave of cavity resonators superpose, and form a system of standing waves.
  • It is found that the certain standing wave field distribution can be set up in the cavity corresponds to different cavity modes.
  • The possible mode of frequencies of cylindrical cavity resonators are known as resonant frequency of the cavity.
  • It is also found that the cavity resonator show the properties like an electronic resonant circuit i.e.,
    • They can store energy in oscillating electric and magnetic fields.
    • They can dissipate a fraction of the stored energy in each cycle of oscillation.

Advantage of cavity resonator over LC circuits

  • The fraction of the stored energy dissipated per cycle of cavity resonator is about 1/20 the fraction dissipated per cycle in L-C circuit.
  • The resonant frequencies of cavity resonator ranges from few megacycles. This range is impossible in LC circuit.
To know more about this lecture please visit on https://youtu.be/VmtLNlu6aOs
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