GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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luminous flux
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luminous intensity
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luminous efficiency
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intensity of illumination
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Detailed explanation-1: -lux, unit of illumination (see luminous intensity) in the International System of Units (SI). One lux (Latin for “light”) is the amount of illumination provided when one lumen is evenly distributed over an area of one square metre.
Detailed explanation-2: -The SI unit of luminous intensity is candela.
Detailed explanation-3: -Lux is a standardised unit of measurement of light level intensity, which is commonly referred to as “illuminance” or “illumination". So what is exactly 1 lux? A measurement of 1 lux is equal to the illumination of a one metre square surface that is one metre away from a single candle.
Detailed explanation-4: -The illumination intensity indicates the luminous flux which strikes a surface. The utilised unit of measure is lux: 1 lx = 1 lm/m² (lumens per square meters).
Detailed explanation-5: -Lux (lx) Lux is basically the unit of illumination and is equal to one lumen per square metre. One lux equals 0.0929 footcandles and this is the metric equivalent of foot-candles. It is also known as a metre-candle.