Modern physics and wave optics from the Class 12 syllabus and first-year engineering physics: the photoelectric effect, de Broglie wavelength, Young's double slit and diffraction, together with a reference page of unit conversions and SI prefixes.
5 reference pages
SI prefixes in circuits, the derived electrical units, checking formulas with units, decibels, dBm and dBW, with worked examples, common mistakes and practice questions.
Young's double slit experiment: path difference, bright and dark fringes, fringe width, the intensity formula, worked examples in air and water, and common mistakes.
Single-slit minima and the width of the central maximum, the diffraction grating and its highest order, a comparison with the double slit, and common mistakes.
Einstein's photoelectric equation, stopping potential, what depends on intensity vs frequency, worked examples on threshold wavelength and work function, and common mistakes.
The de Broglie wavelength in every form, the 1.227/√V nm electron shortcut, worked examples for an electron, a cricket ball and a proton vs alpha particle, and common mistakes.