? Afshar Practice – Definition and Explanations

Introduction

L’Afshar experience experience Quantum mechanics (Quantum mechanics is the study of physics and… allows canceling the principle of complementarity of Niels Bohr (Niels Henrik David Bohr (October 7, 1885, Copenhagen, Denmark -…)that is, it allows observing the corpuscular and wave aspects at the same time. light (Light is a collection of visible electromagnetic waves…).

This experiment was put point (graphic) to talk physicist (A physicist is a scientist who studies the field of physics, ie…) Iranian-American Shahriyar Afshar. Originally created in 2001, it has been redesigned several times to bring demonstration (In mathematics, demonstration allows you to create a proposition from…) as flawless as possible. Although everything (The whole, understood as the whole of what exists, is often interpreted as the world or…)he currently (2007) doesobject (In general, the word object (from Latin objectum, 1361) refers to an entity defined by …) There is much debate about its interpretation. Lots of critiques as well as comments alternatives (Alternatives (original title: Destiny Three Times) is a novel published by Fritz Leiber…) about the phenomenon is regularly presented on websites and conferences physical (Physics (from Greek φυσις, nature) etymologically…)at academic conferences and arXiv scientific archives.

Preliminary reminders

Figure 1: Figintervention (In wave mechanics we talk about interference when two waves of the same type…)

Complementarity principle conditions (In botany, stipules are leaf parts, two in number, leaf-shaped…) two quantum quantities cannot be measured simultaneously. For example, when we want to observe two possible manifestations of light simultaneously: wave (A wave is the propagation of a disturbance that creates a change in its path that reverses…) and particle. Therefore, the wave and particle nature of a cannot be observed and measured simultaneously photon (In particle physics, a photon (often denoted by the letter γ — gamma)…).

Figure 2: Step-by-step intervention figure

The simplest way to emphasize the wave nature of light is the experiment of Young’s slits, the interference fringes created prove the existence of waves (Fig. 1). The most surprising thing is that if we use a light source capable of emitting one photon at a time, the interference figure remains visible (Fig. 2), then it consists of one photon. fog (Fog is a meteorological phenomenon consisting of masses…) including light points density (The density or relative density of a body is equal to the ratio of its density ….) varies according to the intensity of the interference fringes.

The question then arises as to which of the two holes in the device the photon could have had to pass (The Passer breed was created by the French zoologist Mathurin Jacques…). The classic interpretation is to assume that the photo the past (The past is above all a concept of time: it consists of all…) it passes through both holes at once and ends by interfering with itself. Any attempt to find out which aperture the photon passed through (which would allow us to show the corpuscular nature of the light) leads to the disappearance of the interference figure.

Therefore, the goal of Afshar’s experiment is to know the path taken by the photon (particle nature) without disturbing the interference fringes (wave nature).