EXAMIANS
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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In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to
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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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Which among the following lamps has the maximum burning hours?
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The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is
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Candela/metre square is the unit of which photometric quantity?
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Which lamp is best suited for lighting an International sports arena?
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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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Candela is the unit of which?
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Wave length for red colour is around
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