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(A) a distant tree or an electric pole(B) a well-illuminated distant building(C) well-lit grills of the nearest window(D) a burning candle laced at the distant edge of the laboratory table

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Answers

2016-02-16T18:28:09+05:30
In order to determine the focal length of a concave mirror, the student should focus on a distant tree or an electric pole.The Correct Answer is A
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