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Engineering Exams RRB-JE CMA (Chemical and Metallurgical Assistant) Technical Abilities 2025 22.04.25 Paper-2 Shift-2 Medium +1 -0.33
The Doppler effect is a phenomenon associated with which of the following?
Correct Answer: A. Wave motion
Explanation: The Doppler effect refers to the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the wave source. This phenomenon is a fundamental characteristic of wave motion, applicable to various types of waves including sound and light. For instance, when a sound source like a siren approaches an observer, the sound waves are compressed, leading to a higher pitch (frequency); as it moves away, the waves stretch out, resulting in a lower pitch. Since the effect specifically describes the behavior of waves under relative motion, it is categorized as a phenomenon associated with wave motion.
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