while studying the reflection of sound for students ABCD used reflecting surfaces put up in the best result and why?a)a thermocol sheet b)a polished ,plane metal sheet c)a polished rough cardboard sheet d)a cushioned chair
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The question seems to be a little vague. So I am assuming that the question means to ask which of the given options are the best reflecting surfaces and why?
The correct answer is the option b - A polished plane metal sheet.
The objects that are flat and hard are known to reflect the sound waves very well. Flat surfaces reflect the waves of sound in such a way that the approaching angle at which the wave hits the surface is equal to the reflecting angle at which the wave is reflected back from the surface. Metal surfaces will reflect the highest percentage of the initial input of sound.
The other given options are porous or soft materials which absorb the sound waves and do not reflect them back.
The correct answer is the option b - A polished plane metal sheet.
The objects that are flat and hard are known to reflect the sound waves very well. Flat surfaces reflect the waves of sound in such a way that the approaching angle at which the wave hits the surface is equal to the reflecting angle at which the wave is reflected back from the surface. Metal surfaces will reflect the highest percentage of the initial input of sound.
The other given options are porous or soft materials which absorb the sound waves and do not reflect them back.
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Tell me answer iam preparing axam
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