Question
Tue March 20, 2012 By: Mrinal

A student has to determine the focal length of a concave mirror by obtaining the image of a distant object on a screen . For getting best result he should focus : choose the correct option: 1. a distant tree or an electric pole 2. a well illuminated distant building 3. well lit grills of the nearnest window 4. a burning candle placed at the distant edge of the laboratory table

Expert Reply
Wed March 21, 2012
option 4 will be the best option other wise option 3 would be  next choice.
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