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Explain with diagram, the vacancy defect...

Explain with diagram, the vacancy defect.

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Statement 1: Frenkel defect showa interstitial as well as vacancy effect Statement 2: In Frenkel defect, solids show color because of F-centre.

Defects are basically irregularities in the arrangement of constituent particles. Broadly speaking the defects are of two types. Namely point defects and line defects. Point defects: The irregularities or deviations from ideal arrangement around a point or an atom in the crystalline substance. Line defects : The irregularities or deviations from ideal arrangement in enitre row of lattice points. Answer the following questions. Select the correct statements : (i) Frenkel defect create a vacancy defect at its original site and an interstitial defect at its new position. (ii) Frenkel defect is stoichiometric point defect. (iii) Frenkel defect is alos called dislocation defect. (iv) Silver halide shows Frenkel defect.

Draw the ray diagrams to show the defective eye and the corrected eye for long sightedness.

Defects are basically irregularities in the arrangement of constituent particles. Broadly speaking the defects are of two types. Namely point defects and line defects. Point defects: The irregularities or deviations from ideal arrangement around a point or an atom in the crystalline substance. Line defects: The irregularities or deviations from ideal arrangement in entire row of lattice points. Answer the following question. Select the correct statements : Frenkel defect create a vacancy defect at its original site and an interstitial defect at its new position. Frenkel defect is also called dislocation defect Silver halide shows Frenkel defect