Đang chuẩn bị liên kết để tải về tài liệu:
Lecture Physics A2: Fundamental of Quantum Mechanics - PhD. Pham Tan Thi

Lecture Physics A2: Fundamental of Quantum Mechanics - PhD. Pham Tan Thi present the content diffraction of light/electron by one slit, double-slits experiments for electrons, wave-particle duality, De Broglie’s hypothesis, for a non-relativistic free particle, . | Fundamental of Quantum Mechanics Pham Tan Thi Ph.D. Department of Biomedical Engineering Faculty of Applied Sciences Ho Chi Minh University of Technology Quantum Mechanics Diffraction of Light Electron by One Slit Double-slits Experiments for Electrons Wave-like character of electrons Wave-Particle Duality Energy in Energy out A beam of light can be thought as . . a flux of particle . an electromagnetic wave Newton Planck Einstein Huygens Maxwell Hertz Electric Field Wavelength λ Zero mass speed c 3 x 108 m s Direction of propagation Energy carried by each particle h 6.6262 x 10-34 J.s Planck c λν Dispersion relation ν frequency 1 T period Free space Particle Photon Wave Electromagnetism - Photoelectric Effect - Interference - Compton Effect - Diffraction de Broglie s Hypothesis Light can behave like a particle and Matter Electron can behaves like a wave Energy of Photon by Special Relativity E pc Energy of Photon by Planck s theory E h de Broglie s wavelength h p Wave if λ gt Scale It turns out that everything s kind of mixed together at the fundamental microscopic scale. For a Non-relativistic Free Particle Momentum is p mv here is v is the speed of the particle Total energy of a free particle E is kinetic energy h h h B p p mv 2mE p2 mv 2 E K 2m 2 Bullet m 0.1 kg v 1000 m s 36 B 6.63 10 m What is the de Broglie s Wavelength of an Electron What is the de Broglie s wavelength of an electron moving at 2.2 x 106 m s What is the de Broglie s Wavelength of an Electron What is the de Broglie s wavelength of an electron moving at 2.2 x 106 m s Now this is really really fast 2.2 million meters per second. But it s not relativistic. It s is still slow compared to the speed of light so we can still do everything fairly classically. 31 p mv 9.1 10 2.2 106 kg m s 2 10 24 N.s 34 24 10 h p 6.626 10 2 10 3.33 10 m This is important number. This speed is a kind of average speed of an electron in ground state of hydrogen. Accelerated What is the de Charges Broglie s electrons .