Applied Physics I

PH25C01

Applied Physics – I

Course Objective(s):

• To impart knowledge and expose the essentials of physics in various engineering applications.

Properties of Matter: Elasticity, Cantilever, Young’s modulus (non-uniform bending), Girders: Bridges and buildings, Viscosity: Stokes method, Surface tension: drop weight method, Thermal expansion, Thermal stress, Bimetallic strips, Expansion joints

Practical: Non-Uniform bending, Young’s modulus of the material, Torsional pendulum, Rigidity modulus of the wire and moment of inertia of the disc.

Activities: Virtual demonstration of thermal stress.

Oscillations: Simple Harmonic motion, Torsional pendulum, Couple per unit twist, Damped and Forced Oscillation

Waves: Waves on a stretched string, Energy and Power, standing waves, Ultrasonics, piezo, electric method, Acoustic grating, Electromagnetic waves: Maxwell equation, Production of EM waves by dipole antenna, Propagation of EM waves in free space , wave equation, Cell phone reception

Practical: Melde’s string experiment – Frequency of an electrically vibrating metal tip.

Activities: Virtual demonstration of propagation of EM waves

Quantum Mechanics: Black body radiation, Photoelectric effect, de Broglie hypothesis, Schrodinger Wave equation, Particle in a box (infinite potential well - three-dimensional box), Barrier penetration and quantum tunnelling.

Practical: Photo-electric effect, Determination of Planck’s constant.

Activities: Virtual demonstration of Scanning Transmission Electron Microscope

Applied Optics: Interference: Air wedge, Michelson’s Interferometer, Fiber optics: Structure of a fiber, Fiber Optic Communication System, Fiber Sensors (Virtual demo), Displacement, pressure sensor and Temperature sensor, Einstein Co- efficient, Nd:YAG laser, CO₂ laser (construction, functioning and applications), dye laser

Practical: Ruling width of Compact disc using Laser, Thickness of a thin sheet/wire using Air wedge Method.

Activities: Demonstration of sensors and applications of Lasers

Weightage: Continuous Assessment: 50%, End Semester Examinations: 50%

Assessment Methodology: Quiz (5%), Assignments (20%), Flipped Class (5%), Practical (30%), Internal Examinations (40%)

References:

1. Young, H. D., & Freedman, R. A. (2020). University physics with modern physics. Pearson.

2. Gaur, R. K., & Gupta, S. L. (2022). Engineering physics. Dhanpat Rai Publications.

3. Mathur, D. S. (2010). Elements of properties of matter. S. Chand Publishing.

4. Griffiths, D. J. (2018). Introduction to quantum mechanics. Cambridge University Press.

5. Silfvast, W. T. (2008). Laser fundamentals (2nd ed.). Cambridge University Press.

E-Resources:

1. Barrier penetration problem and Quantum tunnelling:

https://archive.nptel.ac.in/courses/115/104/115104096/

2. EM waves and wireless channelling: https://onlinecourses.nptel.ac.in/noc24_ee31/preview

3. CO2 Laser: https://onlinecourses.nptel.ac.in/noc25_ph03/preview

4. Bimetallic Strips _ https://www.youtube.com/watch?v=WZQ8lvxdzDk

5. Cell phone Reception_ https://www.youtube.com/watch?v=1JZG9x_VOwA

6. Dipole Antenna_ https://www.youtube.com/watch?v=4xF1Fq2wB1I

7. Optical Sensors_ https://auece.digimat.in/nptel/courses/video/108106173/L02.html

8. Scanning Tunnelling Electron Microscope

https://www.youtube.com/watch?v=XNYZYbXNWQA