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Light Leaving a Point Source Spreads Out So That the Apparent

Question 198

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Light leaving a point source spreads out so that the apparent brightness I of light per unit area varies with distance d according to which law ( Light leaving a point source spreads out so that the apparent brightness I of light per unit area varies with distance d according to which law ( means proportional to ) ? A) I = constant B) I 1/d² C) I d² D) I 1/d means "proportional to") ?


A) I = constant
B) I Light leaving a point source spreads out so that the apparent brightness I of light per unit area varies with distance d according to which law ( means proportional to ) ? A) I = constant B) I 1/d² C) I d² D) I 1/d 1/d²
C) I Light leaving a point source spreads out so that the apparent brightness I of light per unit area varies with distance d according to which law ( means proportional to ) ? A) I = constant B) I 1/d² C) I d² D) I 1/d d²
D) I Light leaving a point source spreads out so that the apparent brightness I of light per unit area varies with distance d according to which law ( means proportional to ) ? A) I = constant B) I 1/d² C) I d² D) I 1/d 1/d

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