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Question
To hear an echo, time interval between the original sound and the echo is ___.
To hear an echo, time interval between the original sound and the echo is ___.
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Solution
The correct option is B more than 0.1 s
To hear an echo, the time difference between the original sound and its echo should be atleast 0.1 s, i.e. greater than or equal to 0.1 s.
To hear an echo, the time difference between the original sound and its echo should be atleast 0.1 s, i.e. greater than or equal to 0.1 s.
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