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Class 12 Physics CBSE and UP Board Dual Nature of Radiation and Matter Chapter-11 Exercise 11.31 NCERT Solutions for Class 12 Physics Chapter 11 Question-31 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-11 physicsclass 12 physicsdual nature of radiation and matterncert class 12
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Class 12 Physics CBSE and UP Board Dual Nature of Radiation and Matter Chapter-11 Exercise 11.30 NCERT Solutions for Class 12 Physics Chapter 11 Question-30 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-11 physicsclass 12 physicsdual nature of radiation and matterncert class 12
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Class 12 Physics CBSE and UP Board Dual Nature of Radiation and Matter Chapter-11 Exercise 11.29 NCERT Solutions for Class 12 Physics Chapter 11 Question-29 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-11 physicsclass 12 physicsdual nature of radiation and matterncert class 12
Ashok0210
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A mercury lamp is a convenient source for studying frequency dependence of photoelectric emission, since it gives a number of spectral lines ranging from the UV to the red end of the visible spectrum. In our experiment with rubidium photo-cell, the following lines from a mercury source were used: λ ₁ = 3650 Å, λ ₂= 4047 Å, λ ₃ = 4358 Å, λ₄ = 5461 Å, λ₅ = 6907 Å, The stopping voltages, respectively, were measured to be: V0₁ = 1.28 V, V0₂= 0.95 V, V0₃= 0.74 V, V0₄ = 0.16 V, V0₅ = 0 V Determine the value of Planck’s constant h, the threshold frequency and work function for the material. [Note: You will notice that to get h from the data, you will need to know e (which you can take to be 1.6 × 10⁻¹⁹C). Experiments of this kind on Na, Li, K, etc. were performed by Millikan, who, using his own value of e (from the oil-drop experiment) confirmed Einstein’s photoelectric equation and at the same time gave an independent estimate of the value of h.]

Class 12 Physics CBSE and UP Board Dual Nature of Radiation and Matter Chapter-11 Exercise 11.28 NCERT Solutions for Class 12 Physics Chapter 11 Question-28 Additional Exercise

2020-2021cbse and up boardclass 12 chapter-11 physicsclass 12 physicsdual nature of radiation and matterncert class 12
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