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प्रश्न
Select the correct option:
In case of longitudinal waves, the particles of the medium vibrate:
विकल्प
in the direction of wave propagation
opposite to the direction of wave propagation
at right angles to the direction of wave propagation
none of the above
उत्तर
in the direction of wave propagation
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संबंधित प्रश्न
Write true or false for a given statement.
Loudness depends on frequency.
| 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 |
Define time period ?
How can the pitch of sound produced in a piano be changed ?
List four substances which are good absorbers of sound.
How do the following factor affect the speed of sound in air?
Pressure in air.
The sound waves are reflected from an obstacle into the same medium from which they were incident. Which of the following changes?
Name three animals, which can hear ultrasonic vibrations.
Explain the types of mechanical waves.
Give scientific reason.
In earlier times, people used to listen for the arrival of a distant train by putting their ear to the rail.
