Same chapter3 marksDifficulty: Medium
Two tuning forks of frequencies 256 Hz and 260 Hz are sounded together. Find the beat frequency.
Oscillations and Waves
3 marksDifficulty: Medium
State the Doppler effect and give one everyday example.
Original Khojo Papers practice question — not from a past board paper.
Answer
The Doppler effect is the apparent change in the frequency of a wave when the source, the observer or both are in motion relative to the medium. The whistle of an approaching train sounds higher in pitch and that of a receding train lower.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The effect is used in radar speed guns and in measuring the recession of galaxies.
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