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Q.2: (i) Express ‘Uncertainty Principal’ briefly. (ii) In the Davisson-Germer Experiment, what will be Bragg Scattering angle...

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Physics

Q.2: (i) Express ‘Uncertainty Principal’ briefly.

(ii) In the Davisson-Germer Experiment, what will be BraggScattering angle (first order) for an electron-beam whendiffracted from the surface of Ni-crystalwith atomic-planes spacingD= 0.215 nm and the kinetic energy of the e-beam is approximately75 eV.

iii. Qualitatively, discuss how the angle will change if thevoltage is doubled.

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