document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=937182>Question 937182</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The intensity of light on the plane surface varies inversely as the square of the distance from the source of light.  you're reading the book 5 feet from an electric light.  if you move one foot closer how many times greater is the intensity of light in the book? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #570673 by </B><A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><B>TimothyLamb(4379)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=TimothyLamb><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=TimothyLamb><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=570673\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> i = C/dd<BR>\n" );
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document.write( "intensity at original position:<BR>\n" );
document.write( "a = C/25<BR>\n" );
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document.write( "intensity one foot closer to light:<BR>\n" );
document.write( "b = C/16<BR>\n" );
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document.write( "ratio of intensities:<BR>\n" );
document.write( "b/a = (C/16)/(C/25)<BR>\n" );
document.write( "b/a = (1/16)/(1/25)<BR>\n" );
document.write( "b/a = 25/16<BR>\n" );
document.write( "b/a = 1.5625<BR>\n" );
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document.write( "answer:<BR>\n" );
document.write( "1.5625 times greater<BR>\n" );
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document.write( "</TD></TR></TABLE>\n" );