EXAMIANS
Solid angle is expressed in terms of
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What will be the total flux emitted by a source of 60 candle power?
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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 lamp is best suited for lighting an International sports arena?
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Which lamps can be directly connected to a solar cell?
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Which among the following lamps has the maximum burning hours?
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Which cells in the eye are responsible for scotopic vision?
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The work of ballast in a fluorescent tube is to
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What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m × 3m rectangular room?
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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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