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प्रश्न
Why is the ceiling and wall behind the stage of good conference halls or concert halls made curved?
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उत्तर
Ceiling and wall behind the stage of good conference halls or concert halls are made curved so that sound after reflection from the wall and ceiling reaches all the parts of the hall.
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संबंधित प्रश्न
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Female voice is shriller than the male voice.
| Column A | Column B |
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| (b) A shriller sound is | (2) second |
| (c) Unit of frequency | (3) sound |
| (d) Unit of time period | (4) of high pitch |
| (e) Curtains | (5) hertz |
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