B.Tech. I & II Semester
Examination, December 2022
Grading System (GS)
Max Marks: 70 | Time: 3 Hours
Note:
i) Attempt any five questions.
ii) All questions carry equal marks.
a) Explain the Heisenberg's uncertainty principle in detail. (Unit 1)
b) Deduce the relation between phase and group velocities. (Unit 1)
a) Obtain the time independent Schrodinger wave equation. (Unit 1)
b) How the Newton's rings are formed? Deduce the expression for diameter of dark and bright fringes. (Unit 2)
a) Describe the construction and working of Mach-Zehnder interferometer. (Unit 2)
b) Explain about the diffraction grating. A parallel beam of Sodium light incident on plane transmission grating having 4250 lines per centimeter and a second order spectral line is observed at an angle of 30°. Find the wavelength of Sodium light. (Unit 2)
a) What is P-N junction diode? Discuss its I-V characteristics. (Unit 3)
b) Explain the construction and working of solar cell with neat diagrams. (Unit 3)
a) Derive an expression for Hall coefficient and Hall voltage. (Unit 3)
b) Derive the relationship between Einstein A and B coefficients. (Unit 4)
a) Explain the construction and working of He-Ne laser. (Unit 4)
b) Explain the numerical aperture of an optical fiber. Calculate the numerical aperture of a fiber with refractive indices of core and cladding are 1.55 and 1.50, respectively. (Unit 4)
a) State and explain Stoke's and Gauss theorem. (Unit 5)
b) Derive Maxwell equations in vacuum. (Unit 5)
Write short notes on any two:
a) Physical significance of wave function (Unit 1)
b) Young's double slit experiment (Unit 2)
c) Bloch's theorem (Unit 3)
d) Properties of Laser Light (Unit 4)