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Illumination

Illumination
Illumination can be expressed in

  lumens.
  lux.
  radians.
  candela.

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Illumination
Which lamp has the best Colour Rendering Index (CRI)?

 LED
 Fluorescent
 High pressure sodium vapour
 Incandescent

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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.
 58.45 Kilolux.
 1.53 lux.

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Illumination
Candela/metre square is the unit of which photometric quantity?

 Luminous Intensity
 Luminance
 Luminous flux
 Illuminance

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Illumination
Which lamps can be directly connected to a solar cell?

 Metal Halide
 Compact Fluorescent
 Incandescent
 LED

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Illumination
Wave length for red colour is around

 700 nm.
 600 nm.
 400 nm.
 500 nm.

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