Veritasium - Science et Magie

Gael BJN · 19 mars 2014

Veritasium est une excellente chaine youtube de vulgarisation scientifique.

Cette semaine, l'expérience présentée a des allures de numéro de prestidigitation:

[video:youtube]

Tout comme pour Vsauce, je ne saurais trop vous conseiller cette chaine qui est une mine d'or d'idées pour un magicien.

Clément LE ROUX · 19 mars 2014

Génial !! Merci du partage

Baraa SALEH · 19 mars 2014

vive newton, vive la physique,

c'est ça la vraie Magie...

Christian GIRARD · 20 mars 2014

Veritasium est une excellente chaine youtube de vulgarisation scientifique.
Cette semaine, l'expérience présentée a des allures de numéro de prestidigitation:

[video:youtube]

Tout comme pour Vsauce, je ne saurais trop vous conseiller cette chaine qui est une mine d'or d'idées pour un magicien.

J'avais publié dans VM cette expérience présentée par Eric Laithwaite, un spécialiste des gyroscopes, voici à nouveau la vidéo :

[video:youtube]

Laithwaite was an able communicator who made many television appearances. Memorable among these were his Royal Institution Christmas Lectures to young people in 1966 and 1974. The latter of these made much of the surprising phenomena of gyroscopes.
In 1974, Laithwaite was invited by the Royal Institution to give a talk on a subject of his own choosing. He decided to lecture about gyroscopes, a subject in which he had only recently become interested. His interest had been aroused by an amateur inventor named Alex Jones, who contacted Laithwaite about a reactionless propulsion drive he (Jones) had invented. After seeing a demonstration of Jones's small prototype (a small wagon with a swinging pendulum which advanced intermittently along a table top), Laithwaite became convinced that "he had seen something impossible". In his lecture before the Royal Institution he claimed that gyroscopes weigh less when spinning and, to demonstrate this, he showed that he could lift a spinning gyroscope mounted on the end of a rod easily with one hand but could not do so when the gyroscope was not spinning. At this time, Laithwaite suggested that Newton's laws of motion could not account for the behaviour of gyroscopes and that they could be used as a means of reactionless propulsion. The members of the Royal Institution rejected his ideas and his lecture was not published. (This was the first and only time an invited lecture to the Royal Institution has not been published.) They were subsequently published independently as 'Engineer Through The Looking-Glass'

Despite this rejection and despite the fact that Laithwaite later acknowledged that gyroscopes behave fully in accord with Newtonian mechanics, he continued to explore gyroscopic behaviour, maintaining the belief that some form of reactionless propulsion could be derived from them. Laithwaite set up Gyron Ltd with William Dawson and, in 1993, applied for a patent entitled "Propulsion System". See US5860317, GB2289757 and WO9530832 for the US, UK and pct application for patents respectively. A United States Patent, Number 5860317, was granted in 1999.

Source : http://en.wikipedia.org/wiki/Eric_Laithwaite

À voir également dans le message en lien ci-dessous d'autres expériences du même Laithwaite (post #406324) :

_Meilleure_self-l%C3%A9#Post406324]CLIC