During the discharge the magnetic forces set up by the passage of current cause the edges of the foil to roll inward toward its center line, thus allowing light to pass into the camera.

During the 1670s corpuscularianism was used by Isaac Newton in his development of the corpuscular theory of light.

During the 1930s other ideas were proposed as non-standard cosmologies to explain Hubble's observations, including the Milne model, the oscillatory Universe ( originally suggested by Friedmann, but advocated by Albert Einstein and Richard Tolman ) and Fritz Zwicky's tired light hypothesis.

During that month, its intelligence services gathered information about sightings by ground observers of Russian-built MiG-21 fighters and Il-28 light bombers.

During April and May winds are light and variable, ultimately backing to an east-southeasterly direction.

During October and November winds again go through a period of light and variable conditions veering to a westerly direction with the onset of summer in the Southern Hemisphere.

During the Ottoman invasion of Central Europe ( between late 14th century and circa 1700 ) Hungarian soldiers protected fortresses and launched light cavalry attacks against the Turks ( see Hungarian Hussars ).

During the gradual process by which Homo erectus made a transition from furry to naked skin, their hair texture putatively changed gradually from Afro-textured hair or ' kinky ' ( i. e. tightly coiled ) to straight hair ( the condition of most mammals, including humanity's closest cousins — chimpanzees ) This argument is based on the principle that curly hair impedes the passage of UV light into the body relative to straight hair ( thus curly or coiled hair would be particularly advantageous for dark-skinned hominids living at the equator ).

During the Ancient and Middle Ages Infantry were categorized by the types of weapons and armor they used, such as heavy, medium, and light infantry.

During the German military occupation 1940-1945, light railways were re-established by the Germans for the purpose of supplying coastal fortifications.

During the time it had " stopped " it had ceased to be light.

* 1942 – During the Battle of the Coral Sea, United States Navy aircraft carrier aircraft attack and sink the Japanese Imperial Navy light aircraft carrier Shōhō.

) according the Talmud Tractate ( Yoma 39a ), " Our Rabbis taught: During the last forty years before the destruction of the Temple ( that is to say around 30ad ) the lot the Lord ’ did not come up in the right ... hand ; nor did the crimson-coloured strap become white ; nor did the westernmost light shine "

During the planning stages of Sea Lion, it was deemed desirable to provide the advanced infantry detachments ( making the initial landings ) with greater protection from small-arms and light artillery fire by lining the sides of a Type A barge with concrete.

During the next nine days, as their supplies ran out, with frozen fingers, little light, and storms still raging outside the tent, Scott wrote his final words, although he gave up his diary after 23 March, save for a final entry on 29 March, with its concluding words: " Last entry.

During Samhain in Ireland, the dead are thought to return, and food and light are left for them.

During the entire 18th century, the dominant view with regard to heat and light was that put forth by Isaac Newton, called the Newtonian hypothesis, which states that light and heat are forms of matter attracted or repelled by other forms of matter, with forces analogous to gravitation or to chemical affinity.

During the first season, the theme music was played over a short film of a flashing blue light attached to the rear of a police motorcycle in Waikiki heading west ( the film is shown at twice the normal speed, as can be seen from people crossing a street behind the police motorcycle ).

During hearings in the South regarding the Voting Rights Act, Washington asked questions that shed light on tactics used to prevent African Americans from voting ( among them, closing registration early, literacy tests, and gerrymandering ).

During synchronization the light flashes ; when synchronized, the light stays lit, usually with a green color.

During the cleansing, a battle took place between the forces of light and the shadow.

During rush hour, traffic signals are used with green lights to allow one car per blink of the light to proceed on to the freeway.

During the 17th century cavalry in Europe lost most of its armor, ineffective against the muskets and cannon which were coming into use, and by the mid-19th century armor had mainly fallen into disuse, although some regiments retained a small thickened cuirass that offered protection against lances and sabres and some protection against shot.

During the classical Greek period cavalry were usually limited to those citizens who could afford expensive war-horses.

During the Franco-Prussian War, at the Battle of Mars-la-Tour in 1870, a Prussian cavalry brigade decisively smashed the centre of the French battle line, after skilfully concealing their approach.

During the 1930s the French Army experimented with integrating mounted and mechanised cavalry units into larger formations.

During the Gunpowder Age, armored cavalry become obsolete.

During the 19th and early 20th centuries most monarchies maintained a mounted cavalry element in their royal or imperial guards.

During the English Civil War dragoons were used for a variety of tasks: providing outposts, holding defiles or bridges in the front or rear of the main army, lining hedges or holding enclosures, and providing dismounted musketeers to support regular cavalry.

During the Napoleonic Wars, dragoons generally assumed a cavalry role, though remaining a lighter class of mounted troops than the armored cuirassiers.

During the 1864 Overland Campaign, Union Maj. Gen. Philip Sheridan's cavalry launched an offensive to defeat Stuart, who was mortally wounded at the Battle of Yellow Tavern.

During the Maryland Campaign of September 1862, Stuart's cavalry screened the army's movement north.

During the St. Louis crusade, dismounted French knights formed a tight lance-and-shield phalanx to repel Egyptian cavalry.

During this time the spear was also used by cavalry.

During these eras, the spear would develop into a longer lance-like weapon used for cavalry charges.

During the repression of the 1907 peasants ' revolt, he was the head of a cavalry unit in Covurlui County.

During the interval, Antonescu, who viewed the separate peace as " the most rational solution ", was assigned command over a cavalry regiment.

During the disembarkation, Shafter sent forward his cavalry division under Joseph Wheeler to reconnoiter the road to Santiago de Cuba.

During his two years there, among his other adventures, he got a position riding as an honorary member of the Mexican cavalry.

During the three-day long battle of Warsaw of 1656, Sobieski's command of a 2, 000 man strong regiment of Tatar cavalry earnt him promotion to the title of Lord Standard-Bearer of the Crown.

During the First Jewish-Roman War of 66 – 73, he sent 2, 000 men, archers and cavalry, to support Vespasian, showing that, although a Jew in religion, he was entirely devoted to the Romans.

During the period of the Israelite Judges, Sisera commanded nine hundred iron chariots and oppressed the Israelites for twenty years from Harosheth Haggoyim, a fortified cavalry base.

During the Battle of France, in World War II, Saumur was the site of the Battle of Saumur ( 1940 ) where the town and south bank of the Loire was defended with great honour by the teenage cadets of the cavalry school.

During a cavalry charge, while attempting to rally fleeing French forces, Pulaski was mortally wounded by grapeshot.

During the Civil War, Morgan's Raid ( a Confederate cavalry campaign from Kentucky ) passed through the northern part of the county during the summer of 1863.