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.'
pledge. v. to deposit personal property as security for a personal loan of money. If the loan is not repaid when due, the personal property pledged shall be forfeit to the lender. The property is known as collateral.To pledge is the same as to pawn.n a simple example, John asks to borrow $500 from Mary. Mary decides first that John will have to pledge his stereo as security that he will repay the debt by a specific time. In law John is called the pledgor, and Mary the pledgee. The stereo is referred to as pledged property.