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.'
Everybody has heard of fraternities that require pledges to recite the Greek alphabet while a match burns down to their fingers. Lambda Chi Alpha chapters don't do stupid stuff like that. This unit is is fun-to-know, for Lambda Chi Alpha brothers or anybody else. The word alphabet itself comes from the first two letters of the Greek alphabet. The original Greek letter society, Phi Beta Kappa, took its initials from the motto Philosophy is the Helmsman of Life. Since then, campus secret societies have adopted letters which have similar cryptic meanings.