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 %. 70 %. 20 %. 45 %. 30 %. 70 %. 20 %. 45 %. ANSWER DOWNLOAD EXAMIANS APP
Illumination What will be the total flux emitted by a source of 60 candle power? 60 lumens. 754.2 lumens. None of these. 0.001326 lumens. 60 lumens. 754.2 lumens. None of these. 0.001326 lumens. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminous Intensity Illuminance Luminous flux Luminance Luminous Intensity Illuminance Luminous flux Luminance ANSWER DOWNLOAD EXAMIANS APP
Illumination Unit of luminous flux is lumens. steradians. lux. candela. lumens. steradians. lux. candela. ANSWER DOWNLOAD EXAMIANS APP
Illumination Wave length for red colour is around 600 nm. 400 nm. 700 nm. 500 nm. 600 nm. 400 nm. 700 nm. 500 nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela is the unit of which? Luminous intensity. Luminous flux. Wavelength. Frequency. Luminous intensity. Luminous flux. Wavelength. Frequency. ANSWER DOWNLOAD EXAMIANS APP
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