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Middle gray. 50% CIELAB lightness. ( Y = 18.4%) In photography, painting, and other visual arts, middle gray or middle grey is a tone that is perceptually about halfway between black and white on a lightness scale; [1] in photography and printing, it is typically defined as 18% reflectance in visible light. [2] [3]
A gray card is a flat object of a neutral-gray color that derives from a flat reflectance spectrum. A typical example is the Kodak R-27 set, which contains one 8 in × 10 in (20 cm × 25 cm) card and one 4 in × 5 in (10 cm × 13 cm) card, each with an 18% reflectance across the visible spectrum, and a white reverse side with a 90% reflectance.
The 10% of the brain myth states that humans generally use only one-tenth (or some other small fraction) of their brains. It has been misattributed to many famous scientists and historical figures, notably Albert Einstein. [1] By extrapolation, it is suggested that a person may 'harness' or 'unlock' this unused potential and increase their ...
The 50% Rule in English faith school admissions introduced in 2010, stipulating that where newly established academies with a religious character are oversubscribed, at least 50% of their places would be open places, i.e. allocated without reference to faith. The rule is sometimes referred to as the Faith Cap on admissions.
The Balkans ( / ˈbɔːlkənz / BAWL-kənz ), corresponding partially with the Balkan Peninsula, is a geographical area in southeastern Europe with various geographical and historical definitions. [1] [2] [3] The region takes its name from the Balkan Mountains that stretch throughout the whole of Bulgaria. The Balkan Peninsula is bordered by ...
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