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प्रश्न
Give one reason for Ultrasonic waves use for echo depth sounding purpose.
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उत्तर
Ultrasonic waves are used for echo depth ranging because they can travel undeviated through a long distance.
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संबंधित प्रश्न
What do you understand by free vibrations of a body?
State one condition for a body to execute free/natural vibrations.
- Name one factor on which the frequency of sound emitted due to vibrations in an air column depends.
- How does the frequency depend on the factor stated in part (a).
State one way of increasing the frequency of a note produced by an air column.
Explain why strings of different thicknesses are provided on a stringed instrument.
[Hint: Natural frequency of vibration of a stretched string is inversely proportional to the radius (or thickness) of string so notes of different frequencies can be produces by vibrating different strings.]
Define the term Amplitude.
(a) Which one of the following graphs A or B shows free vibrations in a vacuum and which one shows free vibrations in a medium?
(b) How did you come to this conclusion.
Where can a body execute natural vibrations?
