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. The Pledge of Allegiance was written by Francis Bellamy, a Baptist minister and magazine writer for The Youth's Companion. The Pledge was first published in 1892 in The Youth's Companion. It was included in an ad for the Official Programme for the National Columbia Public School Celebration of October 12, 1892, a celebration of the 400 year anniversary of Columbus' discovery of America.