Optical Gradient Force

Famous quotes containing the words optical and/or force:

    “There is an optical illusion about every person we meet.”
    —Ralph Waldo Emerson (1803–1882)

    “A grocer is attracted to his business by a magnetic force as great as the repulsion which renders it odious to artists.”
    —HonorĂ© De Balzac (1799–1850)