document.write( "Question 461960: Astronomers can use the brihtness of two light sources,such as stars, to compare the distances from the light sources.The intensity , or brightness, of light I is inversely proportionnal to the square of the distance from the light source d.
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document.write( "a) rite an qution that represents this sititution.
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document.write( "b) if d is the independent variable and I is the dependent variable,graph the rqution from exercise a when k=16
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document.write( "c) if two people are viewing the same light source,and one person is three time the distance from the light source as the other person,compare the light intensities t
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document.write( "page 470#42 \n" );
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Algebra.Com's Answer #316740 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Astronomers can use the brihtness of two light sources,such as stars, to compare the distances from the light sources.The intensity , or brightness, of light I is inversely proportionnal to the square of the distance from the light source d. \n" ); document.write( "a) write an equation that represents this situation. \n" ); document.write( "Ans: I = k/d^2 \n" ); document.write( "----------------------- \n" ); document.write( "b) if d is the independent variable and I is the dependent variable,graph the equation from exercise a when k=16 \n" ); document.write( "I = 16/d^2 \n" ); document.write( "------------------ \n" ); document.write( " \n" ); document.write( "----------------------------------------------- \n" ); document.write( "c) if two people are viewing the same light source,and one person is three times the distance from the light source as the other person,compare the light intensities t \n" ); document.write( "-- \n" ); document.write( "intensity for person closer to sight source = k/d^2 \n" ); document.write( "intesity for person further away = k/(3d)^2 \n" ); document.write( "--- \n" ); document.write( "Compare the two by dividing: [k/d^2]/[k/(3d)^2] = (k/d^2) = 9\r \n" ); document.write( "\n" ); document.write( "---- \n" ); document.write( "The intesity for the person closer to the light source \n" ); document.write( "is 9 times as great as for the person further away from \n" ); document.write( "the light source. \n" ); document.write( "============ \n" ); document.write( "Cheers. \n" ); document.write( " \n" ); document.write( " |