Which of the following are the application of Doppler's effect?
Correct answer: D. Sending radar signals
- A. Hologram technology
- B. To obtain the frequency of the matter waves
- C. Determining speed of light in mediums
- D. Sending radar signals
Explanation
The applications of doppler effects are tracking satellite, measuring speed of automobile by traffic police, sending radar signals, VOR, homosonde, sonar and spectral analysis of light emitted by stars.
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Progressive waves transfer energy through oscillations, with wavelength, frequency, amplitude and wave speed related by v = fλ; sound speed depends on the medium. Superposition produces interference and stationary waves in strings and organ pipes, while simple harmonic motion describes the oscillation itself and must be distinguished from wave propagation.
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