Illumination 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? 2√2 : 1 2:1 1: 2√2 1:2 2√2 : 1 2:1 1: 2√2 1:2 ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the total flux emitted by a source of 60 candle power? 0.001326 lumens. 60 lumens. None of these. 754.2 lumens. 0.001326 lumens. 60 lumens. None of these. 754.2 lumens. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamps can be directly connected to a solar cell? Incandescent Compact Fluorescent LED Metal Halide Incandescent Compact Fluorescent LED Metal Halide ANSWER DOWNLOAD EXAMIANS APP
Illumination The range of visual spectrum is 300nm - 1000nm. 480nm - 1000nm. 300nm - 760nm. 480nm - 760nm. 300nm - 1000nm. 480nm - 1000nm. 300nm - 760nm. 480nm - 760nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination A 1000 W bulb fitted with a reflector illuminates an area of 3 m x 3 m with an average illumination of 450 lux. If the bulb has and efficiency of 9 lumens / watt the efficiency of the reflector is 30 %. 20 %. 70 %. 45 %. 30 %. 20 %. 70 %. 45 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination 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? 2 5 6 4 2 5 6 4 ANSWER DOWNLOAD EXAMIANS APP
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