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According to the inverse square law of light, how will the apparent brightness of an object change if its distance to us triples?
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According to the inverse square law of light, how will the apparent brightness of an object change if its distance to us triples?

User Manuel Schmitzberger
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According to the inverse square law of light, apparent brightness will decrease by a factor of 9. Use the formula
B=L/(4*pD^2), to check it.
User Digestivee
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