Asked by Anonymous
A source of light is used to illuminate a screen. 1m from the source, the intensity of the light falling on the screen is 12 000 lux. Calculate the intensity on the screen at distances of:
a) 2m
b) 3m
a) 2m
b) 3m
Answers
Answered by
bobpursley
double the distance, 1/4 the intensity
triple the distance, 1/9
triple the distance, 1/9
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