light

optimist

zest

nationality

Senegalese

occupation / innovator as

anthropologist

historian

physicist

politician

university professor

University of Dakar

innovator in the field of

fashion design

French

cause of death

natural causes

fashion designer

businessperson

grand couturier

is made up of waves vibrating up and down perpendicular to the direction of the light travels, visualised as wave propagation.

Christiaan Huygens, believed that light was made up of waves vibrating up and down perpendicular to the direction of the light travels, and therefore formulated a way of visualising wave propagation. This became known as 'Huygens' Principle'. Huygens theory was the successful theory of light wave motion in three dimensions. Huygen, suggested that light wave peaks form surfaces like the layers of an onion. In a vacuum, or other uniform mediums, the light waves are spherical, and these wave surfaces advance or spread out as they travel at the speed of light. This theory explains why light shining through a pin hole or slit will spread out rather than going in a straight line (see diffraction).

is someone who keeps his motor running when he goes into a fashion-shop with his wife.

is the secret of all beauty. There is no beauty that is attractive without zest.

Zest is the secret of a11 beauty. There is no beauty that is attractive without zest.

Christian Dior

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Christian Dior