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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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Davisson Germer's experiment | Quantum mechanics

Davisson Germer's experiment

This experiment provide the experimental confirmation of de Broglie hypothesis

Experimental arrangement of Davisson Germer experiment
  • F = Filament, made of tungsten.
  • The electrons are accelerated from F on heating it by a low tension battery.
  • G = An anode containing a fine hole.
  • C = Nickel crystal, the electrons are strike on this crystal and then scattered in all possible directions.
  • D = Detector, which can be rotated on a circular scale S, and this detector is used to measure the intensity of electrons scattered by C.
  • ф = Angle between the incident electron beam on crystal and the scattered direction of electron.
  • If we plot a graph between ф and I (intensity of scattered electron beam by C) at different V.

Conclusions

  • I depends on ф.
  • There is always a bump or kink occurs in the curve at ф = 50°.
  • As the value of accelerating voltage V increases the size of bump increases.
  • The bump become maximum at V = 54 volt.
  • On further increasing the value of V, bump starts to decrease.
  • According to de Broglie

  • From Bragg’s law
            2d sin θ = nλ
  • Here n = order of diffraction, d = inter-planar distance, and θ = glancing angle of diffraction
  • For X-ray analysis Ni works as plane diffraction grating
  • d111 = 0.91 Å for Ni crystal
  • Since diffraction angle ф = 50°
  • Therefore glancing angle θ = (180 ー50) / 2 = 65°
        ∴    2 ✕ 0.91 sin 65° = 1 ✕ λ
        or    λ = 1.65 Å
  • The excellent agreement between the two results for wavelengths (λ) confirms de-Broglie hypothesis for electrons.
  • It means the electron beam of energy 54eV at 50° angle posses strong diffraction, which shows the wave nature and Ni crystal works as diffraction grating.
To know more about Davisson Germer experiment in English please click on the link https://youtu.be/ID3UPMYAZcs and in bilingual (Hindi/English) click on https://youtu.be/VSZn1_2eldo
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