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The intensity, Io, of a light source is reduced to I after passing

The intensity, Io, of a light source is reduced to I after passing
through d metres of fog, according to the formula I=Io(e)^-0.12X.
a) If the initial intensity was 1200 lumens, at what distance, to the nearest hundredth of a metre, will the read more ..

Shhqwer123 Mar 31, 2021