IL_{1} = 10 log (I_{1}/I_{0})

IL_{2} = 10 log (I_{2}/I_{0})

IL_{1} - IL_{2} = 10 log [(I_{1}/I_{0}) -
(I_{2}/I_{0})]

= 10 log (I_{1}/I_{2}) {*Remember the difference of
logs is the log of the quotient*}

105 = 10 log (I_{1}/I_{2})

log (I_{1}/I_{2}) = 10.5

(I_{1}/I_{2}) = 3.2X 10^{10}
Return to Self Test 2