Chapter 14: Waves

NCERT Class 11 Physics, Part II, Chapter 14. 6 lessons, 13 narrated 3D videos, 9 simulations and 12 quiz questions, following the textbook section by section.

Transverse and longitudinal wavesNCERT §14.1–14.2 · 2 narrated 3D videos, 1 interactive simulation and 2 quiz questionsDrop a pebble into a still pond. Circular ripples spread outwards across the water.
The equation of a travelling waveNCERT §14.3 · 2 narrated 3D videos, 1 interactive simulation and 2 quiz questionsMove one end of a long string up and down in simple harmonic motion. A sinusoidal wave travels along the string towards plus x.
Speed of a travelling waveNCERT §14.4 · 2 narrated 3D videos, 1 interactive simulation and 2 quiz questionsPut a marker on one crest of a travelling wave and follow it. A crest is a point of fixed phase, so as it moves, k x minus ω t stays constant.
The principle of superpositionNCERT §14.5 · 2 narrated 3D videos, 2 interactive simulations and 2 quiz questionsTwo friends hold the ends of a long rope. Each flicks a pulse towards the other. What happens when the pulses meet? Do they bounce off each other like two balls?
Reflection and standing wavesNCERT §14.6 · 3 narrated 3D videos, 2 interactive simulations and 2 quiz questionsTie one end of a rope firmly to a wall and send a crest along it. When the pulse reaches the wall, it comes back upside down, as a trough.
BeatsNCERT §14.7 · 2 narrated 3D videos, 2 interactive simulations and 2 quiz questionsStrike two tuning forks together: one of 256 hertz and one of 260 hertz. You do not hear two separate notes. You hear one note that swells and fades, about four times…