Can you please explain a experiment, that can be carried out without any cost, that will determine the focal point of a concave mirror.
Try with a spoon. Start far away from your face, and watch your image as you bring the spoon toward yourself. The image will be inverted. When the image flips, your face is at the focal point of the mirror.
Try with a spoon. Start far away from your face, and watch your image as you bring the spoon toward yourself. The image will be inverted. When the image flips, your face is at the focal point of the mirror.
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how accurate does it have to be?
close one eye and look into the mirror with the other.
the distance between your eye, and the mirror, at which your eye looks largest, it twice the focal length.
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Put a concave mirror on one side, then get an object, any object, slowly moves toward the concave mirror. Observe the image appeared on the mirror, at the instant where there are no images present, you have reached the focal point of the mirror
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