Illumination Which among the following lamps has the maximum burning hours? Compact Fluorescent. LED. Incandescent. Metal halide. Compact Fluorescent. LED. Incandescent. Metal halide. 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
Illumination Total flux or lumens required in any lighting scheme depends inversely on reduction factor. utilization factor. reflection factor. None of these reduction factor. utilization factor. reflection factor. None of these ANSWER DOWNLOAD EXAMIANS APP
Illumination The solid angle subtended by an area of 2400 cm2 on the surface of a sphere of diameter 1.2 m is 2 / 3. 1 / 3. 2 / 5. 3 / 2. 2 / 3. 1 / 3. 2 / 5. 3 / 2. ANSWER DOWNLOAD EXAMIANS APP
Illumination In illumination technology total lumens emitted by source / total lumens available after waste of light is equal to beam factor. absorption factor. waste light factor. utilization factor. beam factor. absorption factor. waste light factor. utilization factor. ANSWER DOWNLOAD EXAMIANS APP
Illumination Solid angle is expressed in terms of steredians. radians / meter. degree. radians. steredians. radians / meter. degree. radians. ANSWER DOWNLOAD EXAMIANS APP
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