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汉语拼音：bō cháng

波在一个振动周期内传播的距离。等于相邻的两个振动位相相同的点之间的距离。相同频率的波在不同介质中传播时的波长不同。

1. 相邻的两个波峰或两个波谷之间的距离。

   艾思奇 《辩证唯物主义历史唯物主义》上篇第三章二：“颜色的感觉是由于不同波长的光波作用于人的眼网膜而引起的。”《新华文摘》1983年第8期：“这样 延安 的广播电台，就要停止播音，另建一个同样波长的电台，赶在延安台停播的当天，接着播音。”

• Blue light has a shorter wavelength than red.

  蓝光的波长比红光的短。

• Radio One has broadcast on this wavelength for years.

  广播1台已经用这个波长广播多年了.

• The authorities were unable to jam this wavelength.

  当局无法干扰这一波长.

• Sunlight consists of different wavelengths of radiation.

  阳光由几种不同波长的射线组成。

• This will also change according to the wavelength of the laser light.

  但这也会随着激光波长的改变而改变.

• To detect shorter wavelengths, astronomers must put instruments above the earth's atmosphere.

  要探测到更短的波长, 天文学家们就必须把仪器送到地球大气层以外去.

• Infrared radiation has wavelengths longer than those of visible light.

  红外辐射的波长比可见光的波长长.

• Stars emit light which contains only certain characteristic wavelengths.

  恒星发出的光只含有特定的波长.

• Waves are all the same length and move in step.

  所有波的波长均相同,而且同步.

• The light is dispersed into its component wave lengths.

  光被色散成各种波长的单色光.

• Such wave fronts are seperated from one another by one - half wavelength.

  这种波阵面彼此间隔半个波长.

• The energy of the photon gives its color, or wavelength.

  光子的能量决定了光子的颜色, 也就决定了它的波长.

• For longer wavelengths a number of extrinsic photoconductive devices exist.

  对于更长的波长,有许多非本征光电导器件可用.

• The'smoothness " of a metal surface depends on the wavelength of the radiation.

  金属表面的 “ 光洁度 ” 与电磁辐射的波长有关.

• The opacity is a function of temperature and wavelength.

  暗度是温度与波长的函数.