Lecture on Quantum Physics and Electron Microscopy

These flashcards cover key vocabulary from quantum physics and electron microscopy, providing definitions for essential terms.

Photon

A particle of electromagnetic radiation that carries energy, traveling at the speed of light.

De Broglie wavelength

The wavelength associated with a particle, defined as λ = h/p, where h is Planck's constant and p is momentum.

Thermal radiation

Electromagnetic radiation emitted due to the thermal motion of particles in matter, generated when heat is converted to radiation.

Luminescence

The emission of light by a substance that has absorbed energy, without the substance being heated to a high temperature.

Stimulated emission

The process where an incoming photon stimulates an excited atom to emit a second photon of the same frequency, leading to coherent light.

Photoelectric effect

The emission of electrons from a material when it absorbs electromagnetic radiation, such as light.

Electron microscope

An instrument that uses an electron beam to magnify objects, allowing for much higher resolution than light microscopes.

Schottky barrier

A potential barrier at the metal-semiconductor junction that affects the flow of electrons.

Thermography

A method of visualizing infrared radiation typically emitted from bodies, useful for diagnostic purposes.

Infrared radiation

Electromagnetic radiation with wavelengths longer than visible light, used in various applications including thermal therapy.