An open organ pipe is vibrating in its fifth overtone. The distance between two consecutive pionts where pressure amlitude is `1/sqrt 2` times pressure amplitude at pressure antinodes,is 40 cm , then the length of open organ pipe is ( neglect end connection )
A. 3 cm
B. 3.6 cm
C. 4.2 cm
D. 4.8 cm
A. 3 cm
B. 3.6 cm
C. 4.2 cm
D. 4.8 cm
Correct Answer – C