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प्रश्न
State the use of echo by a bat, dolphin and fisherman.
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उत्तर
Bats, dolphin and fisherman detect their enemies or obstacles or position of fish by emitting/sending the ultrasonic waves and hearing/detecting the echo.
संबंधित प्रश्न
How is the frequency of a stretched string related it’s tension?
What is the condition necessary for an echo to be heard distinctly?
Name the waves which are used in sonar to find the depth of a sea. Give one reason for their use.
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey
What are mechanical waves?
Define the term Frequency (as applied to sound waves)
Write the approximate value of the speed of sound in iron.
How are bats able to fly in the dark?
Why is an echo not heard when the distance between the source of sound and reflection body is less than 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.
