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Write a activity to finding the normal to a curved surface.. ( NOTICE :- please Don't write wrong or silly answers ) |
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Answer» -Take a small piece of thin foam or rubber.-Put some pins in a straight line on the foam.-All these pins are perpendicular to the foam.-If the foam was considered as a mirror, each pin WOULD represent the normal at the point.-Any ray incident at the point where the pin makes contact with the surface will reflect at the same angle the incident ray made with the pin - normal.-Now BEND the foam piece inwards.-The pins still represent the normal at various points.-You will OBSERVE that all the pins TEND to coverage at a point.---This will be appear like a CONCAVE mirror.-Now bend the foam piece outwards.-The pins seem to move away from each other that means they diverge.-The pins still represent the normal at various points.---This will be appear like a convex mirror.I hope my efforts will not get ruin and you'll find these answer helpful:) |
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