What is the meaning of "the length of a wave" according to paragraph 3?

根据第三段，“the length of a wave” 是什么意思？

youdao

The entire length of the tower is equipped with a feeder (a coaxial wave-guide) through which signals are transmitted from the transmitter to the antenna on the spire.

信号传输线(一个同轴波导管)贯穿整个塔身，通过它，信号从传输器运送到塔尖的天线。

youdao

Each band represents a deviation of one half wave length of the applied light.

每条光带表示所用光的一个半波的波长的偏差。

youdao

Well, if this thing is going to vibrate for any length of time it better be a standing wave.

好的，如果它在任意时间振动,那它就是驻波。

麻省理工公开课 - 固态化学导论课程节选

But nothing actually travels the axon's length except a wave of electrical potential.

ECONOMIST: Andrew Huxley

It was felt along the length of Sumatra but, unlike the one on December 26th, did not trigger a great wave and so devastated only a relatively small area: the islands of Nias and Simeulue and neighbouring islets about 130km (80 miles) off the coast.

ECONOMIST: Another earthquake, but no wave, strikes Sumatra

Scaglione reiterates his company's foucs on the future of LC-TV and referrences the new AQUOS 57-inch model with a 5 wave-length backlight, 176 degree viewing angle, 1500:1 contrast ratio, and a 4-millisecond response time.

ENGADGET: Live coverage of the Sharp press event