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Illumination

Illumination
Candela is the unit of which?

 Wavelength.
 Luminous intensity.
 Frequency.
 Luminous flux.

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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

 1.15 lux.
 17.32 lux.
 1.53 lux.
 58.45 Kilolux.

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Illumination
Illumination can be expressed in

  lumens.
  candela.
  lux.
  radians.

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Illumination
Unit of luminous flux is

  candela.
  lumens.
  steradians.
  lux.

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Illumination
Solid angle is expressed in terms of

 degree.
 radians / meter.
 radians.
 steredians.

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Illumination
The illumination at a point 5 meters below a lamp in 6 lux. The candle power of the lamp is

  30
 200.
  150.
 140.

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