MCQ
A person standing between two cliffs hears two echo one after 3 sec and another after 4 sec , so time taken for first echo is ______ and that for second echo is __________ .
- A$3 s, 4 s$
- ✓$3 s, 1 s$
- C$3 s, 7 s$
- D$7 s, 7 s$
✓
Answer
Correct option: B.
$3 s, 1 s$
(b)
$3 s, 1 s$
Explanation:
First echo is -3s
And the time taken for the second echo is -1s
The first echo arrives after 3 seconds, indicating a 3 -second round - trip time for the sound wave. The second echo arrives 1 second after the first, indicating a 1-second additional round-trip time to the second cliff.
$3 s, 1 s$
Explanation:
First echo is -3s
And the time taken for the second echo is -1s
The first echo arrives after 3 seconds, indicating a 3 -second round - trip time for the sound wave. The second echo arrives 1 second after the first, indicating a 1-second additional round-trip time to the second cliff.
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