Illumination Luminous efficacy of a typical HPSV lamp is in between 40 - 70 lm/watt. 120 - 200 lm/watt. 10 - 40 lm/watt 70 - 120 lm/watt. 40 - 70 lm/watt. 120 - 200 lm/watt. 10 - 40 lm/watt 70 - 120 lm/watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamp has a negative Colour Rendering Index (CRI)? Low pressure sodium vapour Fluorescent LED High pressure sodium vapour Low pressure sodium vapour Fluorescent LED High pressure sodium vapour ANSWER DOWNLOAD EXAMIANS APP
Illumination A 200 candle power lamp is hung 4 m above the centre of circular area of 5 m diameter. The illumination at centre of the area is 17.5 lux. 18.5 lux. 13.5 lux. 12.5 lux. 17.5 lux. 18.5 lux. 13.5 lux. 12.5 lux. ANSWER DOWNLOAD EXAMIANS APP
Illumination Wave length for red colour is around 700 nm. 400 nm. 600 nm. 500 nm. 700 nm. 400 nm. 600 nm. 500 nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination The range of visual spectrum is 300nm - 1000nm. 480nm - 1000nm. 480nm - 760nm. 300nm - 760nm. 300nm - 1000nm. 480nm - 1000nm. 480nm - 760nm. 300nm - 760nm. ANSWER DOWNLOAD EXAMIANS APP
Illumination 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 None of these Lambert’s cosine law. law of square inverse. both A and B. None of these Lambert’s cosine law. law of square inverse. both A and B. ANSWER DOWNLOAD EXAMIANS APP
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