vector - matrix - multiplying them
fundemental principles
in the next video , u will see
Discrete Energy Levels
Electrons orbit their atomic nucleus in well defined orbits corresponding to discrete energy levels. The electrons can jump from one energy level to a vacant energy level, but they cannot exist in between. Transitions between these energy levels gives rise to absorption and emission of light in discrete spectral lines (wavelengths). The students are encouraged to look through their diffraction gratings at helium and neon light sources to see evidence of these discrete wavelengths of emitted light.
Particles and Waves
Quantum mechanics introduces some very non-intuitive concepts, e.g. light behaves as both a particle (a photon) and a wave, and a particle behaves like a wave with a wavelength inversely proportional to its momentum. Interference is a wave phenomenon, and indeed particles can interfere with each other. Both the position and momentum of a particle cannot be accurately specified at the same time (Heisenberg's uncertainty principle).
Diffraction by a Slit
Diffraction of light by a narrow vertical slit is a well understood classical wave phenomenon consistent with Heisenberg's uncertainty principle. The narrower the slit, the smaller is the uncertainty in the horizontal position of the photons which have to sneak through the narrow opening, so the greater is the horizontal spread of the transmitted protons (uncertainty in their momentum). Quantum mechanics only allows you to predict positions of particles with certain probabilities. In the classical, Newtonian, world you can predict the position and movement of a particle to any degree of accuracy - NOT in the microscopic quantum world. The Newtonian picture is perfect for describing the behaviour of basketballs and planets in the macroscopic world.
let us return to classical mechanics and know something about vectors
then come back to quantum mechanics
the identity of operator
operator - matrix multiplication - example 1
operator - matrix multiplication - example 2
adjoint operator
Defination of hermitian operator
Hermitian Operators - Eigenvalues & Eigenvectors
Example Of Orthonormal Function
Unitary Operator
State Vector - General Concepts
POSITION OPERATOR- Dirac Delta Function
Momentum Operator - Hermitian Properties
THE BEST LECTURE I'VE EVER SEEN
Eigenfunctions of Momentum Operator
The Double Slit Experiment, Matter both a Particle and a Wave
Properties Of Dirac Delta Function
Fourier Transform Of Dirac Delta Function
Dirac Normalization Of Momentum Eigenfunctions - Part 1
Momentum And Position Commutator
Expectation value
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