Which phenomena can be applied to estimate the velocity of star with respect to earth ___________________?
Correct answer: A. Dopplers effect
- A. Dopplers effect
- B. Interference of waves
- C. Beats phenomena
- D. All of these
Explanation
The Doppler effect causes a change in the observed frequency when a star moves relative to Earth, allowing its radial velocity to be estimated from the shift in its spectral lines. Interference and beats do not directly provide the star's velocity in this situation. The likely mistake is choosing all of these by treating every wave phenomenon as a method of measuring stellar motion.
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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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