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PART – B (5 x 10 = 50 Marks)
Note: Answer all questions. Each question carries 10 marks.
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11. (a) Describe the formation of Newton’s rings in reflected light and explain how to determine the wavelength of light using Newton’s rings. [5M]
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(OR)
(b) Explain the principle, construction and working of a Ruby laser. [10M]
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12. (a) Explain the origin of magnetic moment in materials. Derive the relation between magnetic susceptibility and temperature. [10M]
(OR)
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(b) Describe the drift and diffusion currents and derive Einstein’s relation. [10M]
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13. (a) What is meant by absorption coefficient? Explain experimental determination of absorption coefficient. [10M]
(OR)
(b) Explain the principle and propagation of light in optical fibers. Deduce the expression for acceptance angle and numerical aperture. [10M]
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14. (a) Derive Schrodinger’s time independent wave equation and explain its physical significance. [10M]
(OR)
(b) Describe the sol-gel method for production of nanomaterials. Explain the applications of nanomaterials. [10M]
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15. (a) Explain the formation of P-N junction diode and discuss the V-I characteristics. [10M]
(OR)
(b) Explain the principle, construction and working of a Piezoelectric Oscillator. [10M]
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