conduct an experiment to find the focal length of a concave mirror?
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Take a concave mirror. Allow rays of sunlight to fall on it.take a piece of paper and keep it in front of the mirror.at a certain distance from mirror,a clear image of sun will be formed.this point is focal point.find the length from pole to focal point.u will get focal length....
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hold a concave mirror such that sunlight falls on it. and take a small paper and slowly move in front of the mirror and find out the point where you get the smallest and bright spot, which will be the image of the sun and measure the distance of this spot from the pole of e mirror and this distance is the focal length (f) of the mirror.
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