Advertisements
Advertisements
प्रश्न
How does a bat make use of ultrasonics waves to find its way?
Advertisements
उत्तर
Use of ultrasonics by bats : Bats have no eyes. But they easily move about without colliding with any object (or obstacle). The reason is that they produce ultrasonic sound as they fly. When this ultrasonic sound comes back after reflection from any object (or obstacle) in their way, they hear it and thus they detect the presence of the object (or obstacle).
APPEARS IN
संबंधित प्रश्न
On what factor does the loudness of a sound depend ?
How does the loudness of sound produced depend on the vibrating area of the body ?
What type of wave is represented :
(a) by density-distance graph?
(b) by displacement-distance graph?
Give two examples each of longitudinal waves and transverse waves.
An observer sitting in line of two tanks watches the flashes of two tanks firing at each other at the same time, but he hears the sounds of two shots 2s and 3.5s after seeing the flashes. If distance between the two tanks is 510m, find the speed of sound.
What is sound? What causes it to produce?
The distance between one crest and one trough of a sea wave is 4.5 m. If the waves are produced at the rate of 240/min, calculate the wave velocity.
Lightning can be seen the moment it occurs. Paheli observes lightning in her area. She hears the sound 5 s after she observed lightning. How far is she from the place where lightning occurs? (speed of sound = 330 m/s).
Longitudinal waves are produced in solids liquids and also in gases.
