Advertisements
Advertisements
प्रश्न
What is meant by an echo? Explain.
Advertisements
उत्तर
An echo is a repetition of sound produced by the reflection of sound waves from a wall, mountain or other obstructing surfaces. The minimum distance from a sound-reflecting wall to hear an echo at 20°C is 17.2 meter.
APPEARS IN
संबंधित प्रश्न
The human ear can detect continuous sounds in the frequency range from 20 Hz to 20,000 Hz. Assuming that the speed of sound in air is 330 ms1 for all frequencies; calculate the wavelengths corresponding to the given extreme frequencies of the audible range
How is the frequency of a stretched string related it’s tension?
Define frequency term in relation to a wave.
The following diagram shows three ways in which the string of an instrument can vibrate.
(a) which of the diagram shows the principal note?
(b) which has the frequency four times that of the first?
(c) what is the ratio of the frequency of the vibration in (i) and (ii)?
Draw a labelled diagram to show the multiple reflections of sound in a part of the stethoscope tube.
Explain how the principle of echo is used by
The bat during its flight at
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey
Define the term Frequency (as applied to sound waves)
Explain reflection at the boundary of a rarer medium.
