Optics: : [op-tiks] - noun. A branch of physics that studies electromagnetic radiation (for example, light and infrared radiation), its interactions with matter, and instruments used to gather information due to these interactions.Optics includes the study of sight. branch of physics that studies electromagnetic radiation (for example, light and infrared radiation), its interactions with matter, and instruments used to gather information due to these interactions.
By 1924, the National Flag Conference, under the leadership of the American Legion and the Daughters of the American Revolution, changed the Pledge's words, 'my Flag,' to 'the Flag of the United States of America.'
The Pledge of Allegiance to the flag of the United States is a pledge that people recite to show devotion and respect for their country. It was first published in the juvenile periodical The Youthâs Companion in 1892. Francis Bellamy, an assistant editor of the magazine, is given credit for writing the pledge.