**Phy 121****: Waves & Oscillations, Optics and Thermal Physics**

**Credit Hours 3.00 (Level-1,
Term-1, EEE) **

*Waves & Oscillations**: Differential equation of simple harmonic oscillator, Total energy and
average energy, Combination of simple harmonic oscillations, Spring mass
system, Torsional pendulum; Two body oscillation, Reduced mass, Damped
oscillation, Forced oscillation, Resonance; Progressive wave, Power and
intensity of wave, Stationary wave, Group and phase velocities.*

*Optics**: Defects of
images: Spherical aberration, Astigmatism, Coma, Distortion, Curvature,
Chromatic aberration. Theories of light; Interference of light: Young's double
slit experiment, Displacements of fringes and its uses, Fresnel bi-prism,
Interference in thin films, Newton's rings, Interferometers; Diffraction:
Diffraction by single slit, Diffraction from a circular aperture, Resolving
power of optical instruments, Diffraction at double slit and N-slits,
Diffraction grating; Polarization: Production and analysis of polarized light,
Brewster's Law, Malus Law, Polarization by double refraction, Nicol prism,
Optical activity, Polarimeters.*

*Thermal Physics:** Heat and
work- the first Law of Thermodynamics and its applications; Kinetic theory of
gases - kinetic interpretation of temperature, Specific heats of ideal gases,
Equipartition of energy, Mean free path, Maxwell's distribution of molecular
speeds, Reversible and irreversible processes, Carnot's cycle, Second Law of
Thermodynamics, Carnot's theorem, Entropy, Thermodynamic functions, Maxwell
relations, Clausius and Clapeyron equation.*