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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
Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium.
| Column A | Column B |
| (a) Vibrations cause | (1) absorb sound |
| (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 |
You recognize your friend by hearing his voice on a telephone. Explain.
A stone is dropped on the surface of water in a pond. Name the type of waves produced.
Select the correct option:
In the region of compression or rarefaction, in a longitudinal wave, the physical quantity which does not change is:
Describe briefly an experiment to prove that vibrating bodies produce sound.
200 waves pass through a point in one second. Calculate the time period of wave.
A musical instrument is producing continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through ______.
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
