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
Fill in the blank.
The number of times a body vibrates in one second is called its ______.
In fig. 2 two musical notes of the same pitch and same loudness are played on a violin and on a piano. Their wave forms are as shown in the diagram below. Explain why the wave patterns are different.
The speed of sound is more in hydrogen than in nitrogen. Is this statement true? Give a reason for your answer.
What is the effect of temperature and pressure on the speed of sound in a gas?
High-frequency sounds that cannot be heard by you are called _______.
Mention two cases in which there is no Doppler effect in sound?
What is a wave?
Distinguish between compression and rarefactions.
