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adoni [48]
3 years ago
7

The illuminance on a surface is 6 lux and the surface is 4 meters from the light source. What is the intensity of the source?

Chemistry
2 answers:
Elza [17]3 years ago
7 0

The correct answer is:

D.  96 candelas


Ghella [55]3 years ago
3 0

Answer: D. 96 candelas

Explanation: Illuminance is defined as the quantity of light incident on a surface per unit of area. It depends on the light’s intensity and its distance from the surface.

E=  illuminance on the surface (in lux)= 6 lux

I =  the intensity of the light from the source (in candelas) = ?

S= distance from the light source to the surface (in meters) = 4 m

E=\frac{I}{S^2}

I=E\times S^2

I=6\times (4)^2=96candela

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