SOLUTION: the illuminance E at a point on a surface is given by the formula
E = I/dē
where E= illuminance in lux
I= luminous intensity of the light source in candelas
d= dist
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Question 262279: the illuminance E at a point on a surface is given by the formula
E = I/dē
where E= illuminance in lux
I= luminous intensity of the light source in candelas
d= distance in metres
rearrange this formula to make d the subject and find the value of d given that E= 25 lux and I= 100 candelas
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
d^2=I/E
d^2=100/25
d^2=4
d=2 meters
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