9. What is meant by a block body? Explain how a black body may be achieved in practice. State and explain Stefan’s law? 10. Discuss energy distribution of a block body radiation spectrum and explain Wien’s displacement law of radiation and law of heat radiation. Stefan’s IMPORTANT FORMULAS S.No QUANTITY FORMULA Stress 1 Strain 2 Young's modulus of elasticity = 3. Bulk modulus of elasticity K = 4. Compressibility 5. Modulus of rigidity 6. ratio Poisson’s 7. Elastic potential energy 8. Elastic potential energy per unit 9. volume 10. law Pascal’s 11. Viscosity F = A dv/dx η 12. Critical velocity 13. law Stoke’s 14. Terminal velocity 15. Equations of continuity 16. Bernoulli's theorem 17 Surface tension 18. Excess pressure inside a liquid drop 19. Excess pressure inside a liquid 20. bubble Capillary rise 21. Relation between the various 22. temperature scales Linear expansion ) L2= L1( 1+αΔT 23. Coefficient of linear expansion 24. Superficial expansion A2= A1 (1 + ) βΔT 25.
9. What is meant by a block body? Explain how a black body may be achieved in practice. State and explain Stefan’s law? 10. Discuss energy distribution of a block body radiation spectrum and explain Wien’s displacement law of radiation and Stefan’s law of heat radiation. IMPORTANT FORMULAS S.No QUANTITY FORMULA 1 Stress 2 Strain 3. Young's modulus of elasticity = 4. Bulk modulus of elasticity K = 5. Compressibility 6. Modulus of rigidity 7. Poisson’s ratio 8. Elastic potential energy 9. Elastic potential energy per unit volume 10. 11. Pascal’s law 12. Viscosity F = η A dv/dx 13. Critical velocity 14. Stoke’s law 15. Terminal velocity 16. Equations of continuity 17 Bernoulli's theorem 18. Surface tension 19. Excess pressure inside a liquid drop 20. Excess pressure inside a liquid bubble 21. Capillary rise 22. Relation between the various temperature scales 23. Linear expansion L2= L1( 1+αΔT ) 24. Coefficient of linear expansion 25. Superficial expansion A2= A1 (1 + βΔT )
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