Illumination The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is 140. 150. 30 200. 140. 150. 30 200. ANSWER DOWNLOAD EXAMIANS APP
Illumination Unit of luminous flux is lumens. lux. candela. steradians. lumens. lux. candela. steradians. 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? 6 2 5 4 6 2 5 4 ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela is the unit of which? Wavelength. Luminous intensity. Luminous flux. Frequency. Wavelength. Luminous intensity. Luminous flux. Frequency. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Luminance Illuminance Luminous flux Luminous Intensity Luminance Illuminance Luminous flux 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 20 %. 45 %. 70 %. 30 %. 20 %. 45 %. 70 %. 30 %. ANSWER DOWNLOAD EXAMIANS APP
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