10. For a string of length L with one fixed end and one open end, the oscillation wave on the string travels at the speed v. What
are the standing wave frequencies?
(A)f=v/L, v/2L, v/3L,
(B) f= v/L, 2v/L, 3vIL, ...
(C) f= 2v/L, v/L.
3v/2L,.. .
(D) f= v/2L, 3v/2L, 5v/2L,
(E) f= v/4L, 3v/4L, 5v/4L.
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