Illumination Candela is the unit of which? Frequency. Luminous flux. Wavelength. Luminous intensity. Frequency. Luminous flux. Wavelength. Luminous intensity. ANSWER DOWNLOAD EXAMIANS APP
Illumination Candela/metre square is the unit of which photometric quantity? Luminance Illuminance Luminous Intensity Luminous flux Luminance Illuminance Luminous Intensity Luminous flux ANSWER DOWNLOAD EXAMIANS APP
Illumination The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is 140. 30 150. 200. 140. 30 150. 200. 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√2 1:2 2√2 : 1 2:1 1: 2√2 1:2 2√2 : 1 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 Lambert’s cosine law. None of these both A and B. law of square inverse. Lambert’s cosine law. None of these both A and B. law of square inverse. ANSWER DOWNLOAD EXAMIANS APP
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 45 %. 70 %. 30 %. 20 %. 45 %. 70 %. 30 %. 20 %. ANSWER DOWNLOAD EXAMIANS APP
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