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Illumination

Illumination
Unit of luminous flux is

  lumens.
  lux.
  candela.
  steradians.

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Illumination
The range of visual spectrum is

 300nm - 760nm.
 300nm - 1000nm.
 480nm - 1000nm.
 480nm - 760nm.

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Illumination
Luminous efficacy of a typical HPSV lamp is in between

 40 - 70 lm/watt.
 120 - 200 lm/watt.
 70 - 120 lm/watt.
 10 - 40 lm/watt

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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

 20 %.
  45 %.
 30 %.
  70 %.

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Illumination
Which lamp is best suited for lighting an International sports arena?

 LED
 Compact Fluorescent
 Incandescent
 Metal Halide

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Illumination
Solid angle is expressed in terms of

 degree.
 steredians.
 radians.
 radians / meter.

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MORE MCQ ON Illumination

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