本题目来源于试卷: Wave Behavior C.4 Stand Waves & Resonance，类别为 IB物理学
[单选题]
A taut string on a guitar is fixedw;fd hi:04uwu )b w/rctd/kn2 at both enbm9 wcm6 0uwq8ds.
What is $\frac{wavelength of fourth harmonic}{wavelength of second harmonic
}$for the string?
A. 4
B. 2
C. $\frac{1}{2}$
D. $\frac{1}{4}$
参考答案: C
本题详细解析:
Explanation: Since the $n^th$ harmonic has frequency of $n$ times of first harmonic frequency and the ratio of frequencies is $\frac{4}{2}=2$. Using $v=fλ$ and knowing that the speed of the wave in the string $v$ is unchanged, the ratio of wavelengths is $\frac{1}{2}$.
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