Illumination Luminous efficiency of a fluorescence lamp is 30 lumens / watt. 40 lumens / watt. 60 lumens / watt. 70 lumens / watt. 30 lumens / watt. 40 lumens / watt. 60 lumens / watt. 70 lumens / watt. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which lamps can be directly connected to a solar cell? Incandescent Compact Fluorescent Metal Halide LED Incandescent Compact Fluorescent Metal Halide LED 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 law of square inverse. None of these Lambert’s cosine law. both A and B. law of square inverse. None of these Lambert’s cosine law. both A and B. ANSWER DOWNLOAD EXAMIANS APP
Illumination Which cells in the eye are responsible for scotopic vision? Rod cells None of these Both ‘a’ and ‘b’ Cone cells Rod cells None of these Both ‘a’ and ‘b’ Cone cells ANSWER DOWNLOAD EXAMIANS APP
Illumination Illumination can be expressed in radians. lumens. candela. lux. radians. lumens. candela. lux. 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. 2 / 5. 1 / 3. 3 / 2. 2 / 3. 2 / 5. 1 / 3. 3 / 2. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS