Doppler's effect can also be used to calculate the speed of
Correct answer: C. expanding galaxies
- A. light
- B. water waves
- C. expanding galaxies
- D. electromagnetic waves
Explanation
C) Expanding galaxies: The Doppler effect is a fundamental tool in astronomy. By observing the redshift (a shift towards longer wavelengths) of light from distant galaxies, astronomers can determine that these galaxies are moving away from us and calculate their recession speed. This phenomenon is a direct consequence of the expansion of
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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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