In Doppler effect, if listener moves towards a stationary source then:
Correct answer: A. Observed frequency is greater than original frequency
- A. Observed frequency is greater than original frequency
- B. Observed frequency is less than original frequency
- C. Observed frequency is equal to original frequency
- D. Observed frequency is independent of original frequency
Explanation
As the listener moves towards a stationary source, the apparent frequency heard by the listener increases, while the original frequency of the source remains constant. This is known as a "blue shift" in the context of visible light, where light from a source moving towards an observer appears shifted towards the blue end of the spectrum.
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About Progressive Waves
Progressive waves transfer energy through a medium or space while particles oscillate about their equilibrium positions. The work includes amplitude, wavelength, frequency, period, phase difference, wave speed and the progressive wave equation, while distinguishing travelling waves from stationary waves, where the pattern has fixed nodes and antinodes.
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