Illumination Luminous efficiency of a fluorescence lamp is 70 lumens / watt. 30 lumens / watt. 40 lumens / watt. 60 lumens / watt. 70 lumens / watt. 30 lumens / watt. 40 lumens / watt. 60 lumens / watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which cells in the eye are responsible for scotopic vision? Cone cells Rod cells Both ‘a’ and ‘b’ None of these Cone cells Rod cells Both ‘a’ and ‘b’ None of these ANSWER DOWNLOAD EXAMIANS APP
Illumination ___________________________ factor is defined as the ratio of the illumination when everything is clean to illumination under normal working conditions. Depreciation. Absorption factor. Utilization. Maintenance. Depreciation. Absorption factor. Utilization. Maintenance. ANSWER DOWNLOAD EXAMIANS APP
Illumination Illumination can be expressed in lux. candela. radians. lumens. lux. candela. radians. lumens. ANSWER DOWNLOAD EXAMIANS APP
Illumination 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 17.32 lux. 1.15 lux. 1.53 lux. 58.45 Kilolux. 17.32 lux. 1.15 lux. 1.53 lux. 58.45 Kilolux. ANSWER DOWNLOAD EXAMIANS APP
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? 2:1 1:2 1: 2√2 2√2 : 1 2:1 1:2 1: 2√2 2√2 : 1 ANSWER DOWNLOAD EXAMIANS APP
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