PUMPA - SMART LEARNING
எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்
Book Free DemoThere will be no Doppler effect in the following situations, and the apparent frequency heard by the listener will be the same as the source frequency.
- When both the source ((\S\)) and the listener ((\L\)) are at rest.
- When ((\S\)) and ((\L\)) move in such a way that their distance from each other remains constant.
- When the source ((\S\)) and the destination ((\L\)) are moving in opposite directions.
- If the source is in the centre of the circle that the listener moves around in.
Numerical based on apparent change in frequency due to doppler effect:
Example 1:
A source producing a sound of frequency \(90\) \(Hz\) is approaching a stationary listener with a speed equal to (\(1/10\)) of the speed of sound. What will be the frequency heard by the listener?
Given:
Frequency(\n\)) \(=\) \(90\) \(Hz\)
Speed(\v\)) \(=\) (\(1/10\)) of the speed of sound
When the source is moving towards the stationary listener, the expression for apparent frequency is
Example 2:
A source producing a sound of frequency \(500\) \(Hz\) is moving towards a listener with a velocity of \(30\) \(m/s\). The speed of the sound is \(330\) \(m/s\). What will be the frequency heard by the listener?
Given:
Frequency of the sound (\(n\)) \(=\) \(500\) \(Hz\)
Velocity of the listener () \(=\) \(30\) \(m/s\)
Speed of the sound(\(V\)) \(=\) \(330\) \(m/s\)
When the source is moving towards the stationary listener, the expression for apparent frequency is
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