18. If illumination varies inversely to the square of its distance from the light source, which would likely happen if the distance from a light source were increased to twice its original value?
A. The illumination will be doubled.
B. The illumination will be halved.
C. The illumination will be reduced to one-fourth of its original value.
D. The illumination will be increased four times of its original value.
Answers & Comments
Answer:
d Po
Explanation:
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