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प्रश्न
The practical application based on the reflection of sound is:
विकल्प
megaphone
sounding board
sonometer
both megaphone and sounding board
MCQ
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उत्तर
Both megaphone and sounding board
Explanation:
Megaphones direct sound by repeated reflections inside their horn-shaped tubes. Sounding boards reflect sound to spread it through a hall. A sonometer is used to study the vibrations of a stretched string.
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