1
Question
A man blows the train whistle as he approaches a crossing. A few moments later he hears an echo of the whistle. A man hears the echo of the whistle because of :
A man blows the train whistle as he approaches a crossing. A few moments later he hears an echo of the whistle. A man hears the echo of the whistle because of :
Open in App
Solution
The correct option is A Reflection
Echoes occur when a reflected sound wave reaches the ear more than 0.1 seconds after the original sound wave was heard. If the elapsed time between the arrivals of the two sound waves is more than 0.1 seconds, then the sensation of the first sound will have died out.The arrival of the second sound wave will be perceived as a second sound rather than the prolonging of the first sound.
Echoes occur when a reflected sound wave reaches the ear more than 0.1 seconds after the original sound wave was heard. If the elapsed time between the arrivals of the two sound waves is more than 0.1 seconds, then the sensation of the first sound will have died out.The arrival of the second sound wave will be perceived as a second sound rather than the prolonging of the first sound.
Suggest Corrections
0
Similar questions
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
