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.'
I Pledge Allegiance to the flag. of the United States of America. and to the Republic. for which it stands, one Nation under God, indivisible, with liberty and justice for all. There are few verses that have been memorized by so many people and uttered as often as the thirty-one word Pledge of Allegiance. Every morning school children, across the United States of America, place their hand across their chest, above their heart and, in unison, recite the Pledge.