EXAMIANS
Total flux or lumens required in any lighting scheme depends inversely on
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The illumination of the surface varies directly with cosine of the angle between normal to surface and direction of the inclined light is given by
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Wave length for red colour is around
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Unit of luminous flux is
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A 200 candle power lamp is hung 4 m above the centre of circular area of 5 m diameter. The illumination at centre of the area is
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What is the work of a driver in case of an LED?
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Candela/metre square is the unit of which photometric quantity?
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Which cells in the eye are responsible for scotopic vision?
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Luminous efficiency of a fluorescence lamp is
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From a uniform light source having luminous intensity of 300 candelas, there exists a plane surface 15 m below. The value of illuminance at a point on the plane surface where the luminous flux rays are inclined at an angle of 30 to the surface is
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