English Posts

The aim of this project is to detect the muon decay events and to measure the muon mean lifetime. For this purpose we will use the scintillation detector described in the following post : Scintillation Detector for Cosmic Muons.

The muon detector we want to realize is based on a plastic scintillator crystal coupled to a photomultiplier. This tool completes the coincidence detector described in the post : Cosmic Rays and Coincidence Detector.

Cosmic rays are energetic particles coming from outer space. The Earth and any other spatial body, as well as satellites and astronauts in orbit, are exposed to cosmic rays. The cosmic rays nature is very diverse (the kinetic energy of the particles of cosmic rays is distributed over fourteen orders …

The photoelectric effect is the observation that many metals emit electrons when light shines upon them. Electrons emitted in this manner can be called photo-electrons.

Food oils (olive oil, seed oil) have interesting optical properties (absorption, fluorescence) due to the content of optically active compounds, such as chlorophyll, beta-carotene and others. These properties can be used to recognize and characterize the various types of oil.

Fluorescence is the property of some substances to re-emit (in most cases at longer wavelength so at lower energy) the received electromagnetic radiation, in particular they absorb the ultraviolet radiation and re-emit it in the visible.

The Planck constant (denoted h, also called Planck’s constant) is a physical constant that is the quantum of action, central in quantum mechanics. This constant determines that the fundamental physical quantities does not vary in a continuous way, but are quantized, that is they can only take on multiple values ​​of this constant .

In physics a black body is an ideal object that absorbs all incident electromagnetic radiation without reflecting (and is therefore called black according to the classical interpretation of the color of the body).

The emission spectrum of a chemical element or a chemical compound is the set of frequencies of the electromagnetic radiation emitted by the electrons of its atoms when they perform a transition from one state to a higher energy towards a lower energy . For each transition between states, the energy of …

Abstract : In this post we propose the construction of a diffraction grating spectrometer based on webcam and software Theremino Spectrometer. The spectrometer is a fundamental tool that allows measurement of the spectrum of a light source, ie the properties of light as a function of its wavelength. The spectrometer …

A quantum dot (QD) is a crystal of semiconductor material whose diameter is on the order of several nanometers – a size which results in its free charge carriers experiencing “quantum confinement” in all three spatial dimensions. The electronic properties of quantum dots are intermediate between those of bulk semiconductors and of discrete molecules and closely related to …