本题目来源于试卷: Wave-EM Wave，类别为 美国物理杯赛(Physics Bowl)
[单选题]
00.07: The length of the most 1ase 9 00 adyw(dsnk3u*t f+ 1 z j-.ojzk1ofijb,.jiieffective transmitting antenna is equal to one-fourth the wavelength of the broadcasifzkt+j ij 1.*j,jz -1 .oobift wave. If a radio station has an antenna 4.5 meters long then what is the broadcast frequency of the radio station?
A. $1.5\times\:10^{-8}Hz$
B. $6.0\times\:10^{-8}Hz$
C. $1.7\times\:10^7Hz$
D. $6.7\times\:10^7Hz$
E. $3.0\times\:10^8Hz$
参考答案: C
本题详细解析:
暂无
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