MadSci Network: Physics
Query:

Subject: why does placing a candle in front of a mirror not increase the total light

Date: Sat Mar 17 22:10:19 2001
Posted by barry
Grade level: teacher/prof School: Frobel
City: Taoyuan State/Province: No state entered. Country: Taiwan, R.O.C.
Area of science: Physics
ID: 984885019.Ph
Message:

Placing a candle in front of a mirror and looking at the reflection, it appears 
that the image's light is almost as intense as the actual candle. Since this 
reflected light is shining into the room in addition to the light directly from 
the candle , isn't the total amount of lightin the room increased? I suspect 
it's not but I'm not sure why, except it violates the law of conservation of 
energy, n'est ce pas? 


Re: why does placing a candle in front of a mirror not increase the total light

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