Advertisements
Advertisements
प्रश्न
उत्तर
A simple method for finding the velocity of sound is echo or open air method.
For example: A person stands at a known distance (d m) from a cliff and fires a pistol and simultaneously starts the stop watch. He stops the stop-watch as soon as he hears the echo. The distance traveled by sound during this time (t seconds) is twice the distance (2d m). The velocity (v) of sound is then calculated as under:
Velocity of sound= `"distance travelled"/" time taken" = (2"d")/"t"`
By repeating the experiment two or three times, the average velocity of sound can be calculated.
APPEARS IN
संबंधित प्रश्न
Define frequency term in relation to a wave.
Define wavelength term in relation to a wave.
State two differences between the light and sound waves.
How do bats avoid obstacles in their way, when in flight?
Name two sound absorbing materials (or objects) which can make our big room less echoey.
What are mechanical waves?
Why will an echo not be heard when the distance between the source of the sound and the reflecting surface is 10 m?
A sound wavelength of 0.332 m has a time period of 10−3 s. If the time period is decreased to 10−4 s, calculate the wavelength and frequency of the new wave.
