EXAMIANS
Unit of luminous flux is
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Which lamp has a negative Colour Rendering Index (CRI)?
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Total flux or lumens required in any lighting scheme depends inversely on
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Solid angle is expressed in terms of
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The solid angle subtended by an area of 2400 cm2 on the surface of a sphere of diameter 1.2 m is
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Which cells in the eye are responsible for scotopic vision?
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What is the ratio of illuminance at a point 5m just below a lamp emitting 100 candelas and at a point 5m away from the first point on the same horizontal plane?
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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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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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In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to
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