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Welcome to the LightNmatter home page. Here you will find a series of short videos exploring various physical concepts, with many hands on demonstrations and experiments. Through those videos I will take you take you in a tour which explores the physical world and tell the story of how we get to know what we know. Most of the content will be accessible to a middle school student and hopefully useful to anyone have an interest to learn and curiosity to learn the world around them, young and old. Please subscribe to the lightNmatter YouTube channel so that you will get a notice when a new video is posted.
Lets begin the tour!
An intuitive introduction to light: Geometrical optics
Reflection refraction and dispersion
Newton's Opticks, more on dispersion and colors,
Formation of rainbows
Total internal reflection and light guides
Formation of images, optical instruments
Speed of light
Greeks to Galileo and Romer - moons of Jupiter
Fizeau's measurement and a desktop measurement of light
What is light:
Newtons corpuscular theory of light
Wave motions
Wave theory of light - interference, diffraction and Doppler effect.
Electromagnetic theory
Electricity and magnetism and Maxwell's Electromagnetic waves
Hertz discovery of Electromagnetic waves.
Thermal radiation:
Picket's experiment and early ides
Kirchhoff laws
Viewing a spectrum
Forming spectra with prisms and gratings, spectroscopes
Emission and Absorption spectra
Discovering the electron
From electrical discharges to Thompson's discovery
Measuring the electron photoelectric effect Zeman effect and the Millikan experiment
Quantum theory,Light as a particle and a wave :
photoelectric effect, photons
Thermal radiation and atoms
principals of quantum theory
superposition, uncertainty and measurements