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Illumination

Illumination
Candela is the unit of which?

 Luminous flux.
 Frequency.
 Luminous intensity.
 Wavelength.

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

 Metal Halide
 Incandescent
 Compact Fluorescent
 LED

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

 Luminance
 Luminous Intensity
 Luminous flux
 Illuminance

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Illumination
Wave length for red colour is around

 500 nm.
 600 nm.
 700 nm.
 400 nm.

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Illumination
The range of visual spectrum is

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

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Illumination
What will be the number of lamps, each having 300 lumens, required to obtain an average illuminance of 50 lux on a 4m × 3m rectangular room?

 2
 4
 6
 5

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