Random Thoughts

Semiconductor Band Gap Explorer Semiconductor Band Gap Explorer Interactive physics visualization & Varshni dynamics Band Diagrams $E_g$ vs. Temperature Direct vs. Indirect ($E$-$k$) Configure Band Structure Adjust the parameters below to observe how the band gap dictates electrical conductivity. A small band gap al...

Classical Dynamics CBCS 2019 : DSE I Questions 2025 | +3-V-S-CBCS(MS)-Sc(H)-DSE-I-Phy | Full Marks: 80 PART-I | Answer all Questions. | 1x12 Degrees of freedom of a particle constrained to move on the surface of sphere is _____. The dimension of generalized force is always dimension of force. True/False Constraint for the system, "rolling of cylinder in an inclined plane without slipping" is holonomic or non-holonomic? If generalised coordinate has the dimension of momentum, then generalised velocity has the dimension of _____. If a co-ordinate corresponding to rotational motion is cyclic, then _____ is a conserved quantity. Work done by virtual displacement is ______. Four dimensional space is called _____ space. The trajectory of a particle in four space is called _____ . If $ds^2=0$, then it is called _____ interval. $p_\mu . p_\mu = $_____. The relative velocity of two photons recede from each other is _____. The expression for Lorentz factor is _____. ...

GE Practical Syllabi GE:II OPTICS, SPECIAL THEORY OF RELATIVITY, ATOMIC PHYSICS, QUANTUM MECHANICS & NUCLEAR PHYSICS LAB. 20 classes (2 hours duration each)-Full Marks: 30 1. Determination of Horizontal component of Earths magnetic field and magnetic moment of a bar magnet using deflection and oscillation magnetometer. 2. Determination of E.C.E. of a Copper by taking 3 readings. 3. Familiarization with Schuster focusing and determination of angle of prism. 4. Determination of Refractive index of the material of a prism using Sodium light. 5. To determine the wavelength of light using plane diffraction grating. 6. To determine the wavelength of light using Newtons ring. 7. Determination of refractive index of (a) glass and (b) liquid by using travelling microscope. 8. Determination of radius of curvature of a convex/ concave mirror by using Kohlrauschs method. 9. To determine the magnifying power of a given telescope. 10. Verification of inverse square law of magnetism ...

Minor Papers 1, 2 and 3. Syllabus Major Core/Paper 1, 2 & 3 as Minor Paper 1, 2 & 3, respectively. Questions 2025 | +3-II-S-NEP-Minor-II-P-1-Sc-Phy. | Full Marks: 100 PART-I | Answer all the following Questions. | 1x10 a. The integrating factors of $\frac{dy}{dx} + y = 3e^x y^3$ is _____ . b. Value of curl $\phi \vec{A}$ is _____ . c. If $\vec{\nabla} \times \vec{ F } = 0$ then $\vec{ F}$ is _____. d. $f(x) . \delta(x - a) =$ _____ . e. $\vec{\nabla} \phi$ in cylindrical co-ordinate is _______. f. Pressure field is an example of _____ field. g. Formula for Wronskian $W(y_{1}, y_{2})$ is _____ . h. The cylindrical coordinate system is orthogonal (True/False) i. Flux of vector field is a scalar quantity. (Yes/No) j. Value of $\hat{ i}\times ( \hat{ j} \times \hat {k })=$ ______. PART-II | Answer the following question. | 2x9 a. Write the condition for Exactness. b. Plot the graph of y = x + 1/x. c. Show that $ div ( \vec {r}/ r^ 3 )=0$. d. ...

Paper 15 Practical LAB: Credit-1 Syllabus Use C/C++/Scilab for solving the problems based on Statistical Mechanics like 1. Plot Planck’s law for Black Body radiation and compare it with Wein’s. 2. Law and Raleigh-Jeans Law at high temperature (room temperature) and low temperature. 3. Plot Specific Heat of Solids by comparing (a) Dulong-Petit law, (b) Einstein distribution function, (c) Debye distribution function for high temperature (room temperature) and low temperature and co mpare them for these two cases. 4. Plot Maxwell-Boltzmann distribution function versus temperature. 5. Plot Fermi-Dirac distribution function versus temperature. 6. Plot Bose-Einstein distribution function versus temperature. Reference Books: Elementary Numerical Analysis, K. E. Atkinson, 3rd Edn. 2007, Wiley India Edition Statistical Mechanics, R. K. Pathria, Butterworth Heinemann: 2nd Ed., 1996, Oxford University Press. Thermodynamic, Kinetic Theory and Statistical Thermodynamics, Francis W. S...

Paper 14 Practical LAB: Credit-1 Syllabus (Minimum 4 experiments are to be done)  1. To verify the law of Malus for plane polarized light.  2. To determine the specific rotation of sugar solution using Polarimeter.  3. To analyze elliptically polarized Light by using a Babinets compensator.  4. To determine the refractive index of liquid by total internal reflection using Wollastons air-film.  5. To determine the refractive Index of (1) glass and (2) a liquid by total internal reflection using a Gaussian eyepiece.  6. To study the polarization of light by reflection and determine the polarizing angle for air-glass interface.  7. To verify the Stefan‘s law of radiation and to determine Stefan’s constant.  8. To determine the Boltzmann constant using V-I characteristics of PN junction Diode. Reference Books: Advanced Practical Physics for students, B. L. Flint and H. T. Worsnop, 1971, Asia Publishing House. Advanced level Physics Practicals,...