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Why thin film observed in sun light exibits colour?
Your Foot!
What quantity of lux or foot-candles in a cave passage is considered total darkness for example .0001 or .001 or .01 or .1 etc or do you need to consider spectral response or some other factor?
darkness is how many footcandles
Who was the first explorer of his time to actually set foot in Asia?
People lived in Asia for ages. It was not like Europe or America, which needed to be explored.
How does people walk?
Left foot, right foot, left foot, right foot. in that order.
What time does it take for light to travel one foot?
According to Mavsman110. in the 'How much time does it take light to travel one foot?' post the answer was 1 nanosecond. Based on that you should be able to safely assume that "one nanosecond divided by 12 = you answer" so the answer is:1/12 Of a nanosecond!
Are lumens and foot candles the same?
Lumens and foot candles are not the same. A lumen is a measurement of the intensity of light, a foot candle is a measurement of lumens per square foot.
What is unit of illumination?
Light intensities are usually measured in candle power. What that means is the equivalent of the light of one candle, measured at a distance of one foot, sometimes called, `foot candles' or `candellas'. +++ In the SI system the flux or "amount" of light, is measured in lumen; and the illuminence or brightness of the light, on a surface in lumens per square metre, a compound unit called the lux.
What unit measures light intensity?
in foot-candles. i.e. the brightness of a candle one foot away
If you have 20 foot-candles of light then you replace light and have 200FC does that mean you have a 100 percent increase in light output?
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How many foot candles are suggested for a retail store?
It depends on the atmosphere of the store. For example, Best buy uses automated lighting with dimmable ballasts to maintain a light level of 55 foot candles.
What size light do you use in a 14.8 X 14.8 room?
It depends on what the room is used for. There are specific tables that designate how many foot candles are needed depending on what the room is to be used for. Without stating what the rooms use is, the question can not be answered.
What is the best amount of light for a classroom?
One recommendation for classrooms is to have an illumination at desk level of 30 to 50 foot candles.
What is the standard foot candle requirement for church lighting?
The light levels in any church depends on many things but for comfortable reading, I would have at least 30 foot candles.
What is unit of brightness?
foot - candles
How bright is 500 foot candles?
500 candelas at 1 foot distance
70 foot candles equals to?
23.33333_ lux
What is the equivalence of 20 foot candles in watts?
40 watt
