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 Sussex Pledge was a pact between Germany and the United States in 1916 during World War I.Germany broke the Pledge by resuming unrestricted submarine warfare.resident Woodrow Wilson warned Germany that this action would not be tolerated. Germany again promised a change in warfare on the 4th May 1916 by issuing the Sussex Pledge.