Advertisements
Advertisements
प्रश्न
In which medium, air or water, an echo is heard much sooner ? Why ?
Advertisements
उत्तर
An echo is heard sooner in water because sound travels faster in water than in air as the speed of sound depends on the density of propagating medium.
APPEARS IN
संबंधित प्रश्न
Does sound follow the same laws of reflection as light does? Explain.
What is the other name of a loud-hailer ?
Name the device which is used to address a small gathering of people.
Fill in the blank with suitable word :
Echoes are caused by the ...................... of sound.
Why do we hear more clearly in a room with curtains than in a room without curtains ?
The echo of a sound is heard after 5 seconds. If the speed of sound in air be 342 m/s, calculate the distance of the reflecting surface.
The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?
State the laws of reflection of sound.
What is an echo ? How is echo formed ?
When sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound remain the same. Do you hear an echo sound on a hotter day? Justify your answer.
