To hear a distinct echo, the time interval between the original sound and reflected sound must be at least
(A) 0.1 seconds
(B) 0.2 seconds
(C) 0.3 seconds
(D) 0.4 seconds
Correct Answer : 0.1 seconds
Question Asked : SSC Junior Engineer (Civil) Exam 2018
Explanation : Echo is defined as the reflection of sound, arriving at the listener some time after the direct sound. As the sensation of sound persists in brain for about 0.1 s, to hear a distinct echo the time interval between the original sound and the reflected one must be at least 0.1s.
....Read more
Useful Quotations for : UPSC, State PSC, IBPS, SSC, Railway, NDA, Police Exams
Like The Facebook Page
CurrentGK for
Current Affairs, Latest GK &
Employment News
Tags : Physics
