1(a). What is binding energy of an atom? (b). Write and explain at least three Neil's...

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1(a). What is binding energy of an atom? (b). Write and explain at least three Neil's Bohr postulate for atomic hydrogen. (c). Draw the energy level diagram of hydrogen and explain in detail the ground state, excitation state, and the metastable state of an atom. MZe 2(a). The total energy of the electron in the stationary orbit is given by En what does the negative sign of the energy expression signify? (b). The energy of a particular state of atom is 10.36eV and the energy of another state is 6.45eV, find the wavelengih of the light emitted when the atom makes a transition from one state to the other. .(c). State the Hamilton's Principle. 3(a). The total energy of the electron in the atom is the sum of its kinetic energy and its potential energy in the field of the Eo nucleus, show that En =- (b). Write short notes on any three of the Lyman series, Balmer series, Paschen series, bracket series and Pfund series (c) Show thatH = 2m 1. (a) With the aid of a diagram and appropriate equations (where necessary) explain PHOTOELECTRIC EFFECT. (b) Write three key features of the photoelectric effect (e) When light of wavelength 300nm is 1.91cV. (i) What is the energy of incident photons? (ii) What is the work function of potassium? incident on potassium the emitted clectrons have maximum kinetic energy ol 2.(a) What is Photon? (b) Write five (5) basic properties of Photon. (e)The energy of a single photon is given as 3.2eV. Calculate the wavelength. •3. (0)Discuss the following extensively with equations where necessary ()The Uncertainty Principle () De Broglie Hypothesis (ii) Bohr's Principle of Complementarity (iv) Correspondence Principle. (b) Calculate De Broglie wavelength of a bullet of mass 20g moving at a speed of 100m/s. 1(a). What is binding energy of an atom? (b). Write and explain at least three Neil's Bohr postulate for atomic hydrogen. (c). Draw the energy level diagram of hydrogen and explain in detail the ground state, excitation state, and the metastable state of an atom. MZe 2(a). The total energy of the electron in the stationary orbit is given by En what does the negative sign of the energy expression signify? (b). The energy of a particular state of atom is 10.36eV and the energy of another state is 6.45eV, find the wavelengih of the light emitted when the atom makes a transition from one state to the other. .(c). State the Hamilton's Principle. 3(a). The total energy of the electron in the atom is the sum of its kinetic energy and its potential energy in the field of the Eo nucleus, show that En =- (b). Write short notes on any three of the Lyman series, Balmer series, Paschen series, bracket series and Pfund series (c) Show thatH = 2m 1. (a) With the aid of a diagram and appropriate equations (where necessary) explain PHOTOELECTRIC EFFECT. (b) Write three key features of the photoelectric effect (e) When light of wavelength 300nm is 1.91cV. (i) What is the energy of incident photons? (ii) What is the work function of potassium? incident on potassium the emitted clectrons have maximum kinetic energy ol 2.(a) What is Photon? (b) Write five (5) basic properties of Photon. (e)The energy of a single photon is given as 3.2eV. Calculate the wavelength. •3. (0)Discuss the following extensively with equations where necessary ()The Uncertainty Principle () De Broglie Hypothesis (ii) Bohr's Principle of Complementarity (iv) Correspondence Principle. (b) Calculate De Broglie wavelength of a bullet of mass 20g moving at a speed of 100m/s.

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