Chemistry: 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? a. 24 candelas b. 144 candelas c. 72 candelas d. 96 candelas

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The illuminance on a surface is 6 lux and the surface

Ответ:

dchannakhone84

17.01.2022

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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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?

a. 24 candelas
b. 144 candelas
c. 72 candelas
d. 96 candelas

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