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What is the term for the change in frequency of a wave due to the motion of the source or observer?
- a)Refraction
- b)Reverberation
- c)Resonance
- d)Doppler effect
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
What is the term for the change in frequency of a wave due to the moti...
The Doppler effect refers to the change in frequency (and hence, pitch) of a wave, such as sound or light, due to the motion of the source or observer.
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What is the term for the change in frequency of a wave due to the moti...
Understanding the Doppler Effect
The Doppler effect refers to the change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave. This phenomenon is commonly associated with sound waves but applies to all types of waves, including light.
Key Aspects of the Doppler Effect:
- Source and Observer Movement: When the source of the wave moves towards the observer, the waves are compressed, leading to a higher frequency (or pitch) perceived by the observer. Conversely, if the source moves away, the waves are stretched, resulting in a lower frequency (or pitch).
- Real-World Examples: Common examples include the change in pitch of a passing ambulance siren or the redshift observed in light from distant galaxies, which indicates their movement away from Earth.
- Mathematical Representation: Although the detailed mathematics can get complex, the basic principle remains: relative motion causes a shift in perceived frequency.
- Applications: The Doppler effect is widely used in various fields such as meteorology (radar), astronomy (measuring the speed of stars), and medical imaging (Doppler ultrasound).
Conclusion:
In summary, the Doppler effect is a fundamental concept in wave physics that explains how the frequency of waves changes due to the relative motion of the source and observer. Understanding this effect enriches our comprehension of both sound and electromagnetic waves in various scientific disciplines.
The Doppler effect refers to the change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave. This phenomenon is commonly associated with sound waves but applies to all types of waves, including light.
Key Aspects of the Doppler Effect:
- Source and Observer Movement: When the source of the wave moves towards the observer, the waves are compressed, leading to a higher frequency (or pitch) perceived by the observer. Conversely, if the source moves away, the waves are stretched, resulting in a lower frequency (or pitch).
- Real-World Examples: Common examples include the change in pitch of a passing ambulance siren or the redshift observed in light from distant galaxies, which indicates their movement away from Earth.
- Mathematical Representation: Although the detailed mathematics can get complex, the basic principle remains: relative motion causes a shift in perceived frequency.
- Applications: The Doppler effect is widely used in various fields such as meteorology (radar), astronomy (measuring the speed of stars), and medical imaging (Doppler ultrasound).
Conclusion:
In summary, the Doppler effect is a fundamental concept in wave physics that explains how the frequency of waves changes due to the relative motion of the source and observer. Understanding this effect enriches our comprehension of both sound and electromagnetic waves in various scientific disciplines.
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What is the term for the change in frequency of a wave due to the motion of the source or observer?a)Refractionb)Reverberationc)Resonanced)Doppler effectCorrect answer is option 'D'. Can you explain this answer?
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What is the term for the change in frequency of a wave due to the motion of the source or observer?a)Refractionb)Reverberationc)Resonanced)Doppler effectCorrect answer is option 'D'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about What is the term for the change in frequency of a wave due to the motion of the source or observer?a)Refractionb)Reverberationc)Resonanced)Doppler effectCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the term for the change in frequency of a wave due to the motion of the source or observer?a)Refractionb)Reverberationc)Resonanced)Doppler effectCorrect answer is option 'D'. Can you explain this answer?.
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