Which is the time it takes a wave crest to travel one wave length

波峰走过一个波长所需的时间

The key of measuring light speed with modulation wave is measuring the modulation wave length.

利用调制波测量光速的关键在于测量调制波的波长,实验中采用相位差法测调制波的波长.

If you know the frequency, you will find the wave length.

如果知道频率, 就可以知道波长.

The key of measuring light speed with modulation wave is measuring the modulation wave length. In this experiment, the modulation wave length is measured with the phase difference method.

利用调制波测量光速的关键在于测量调制波的波长，实验中采用相位差法测调制波的波长。

This formula makes it easy to determine the wave length of sounds.

这一公式使得求声音的波长十分容易.

The frequency, wave length, and speed of sound are closely related.

频率, 波长和声速三者是密切相关的.

By a quarter of wave length commutator principle, combining with electromagnetic wave absorb of filling material.

利用四分之一波长转换器原理, 结合填充材制成电磁波吸收体.

Angle of incidence and wave length for ellipsometry method were studied.

对椭圆偏振法的入射角和波长进行了探讨.

Moreover the component examination sensitivity and the infrared wave length concern.

而且器件的检测灵敏度与红外波长有关.

The tropospheric atmosphere refractivity of different laser wave length is expatiated.

阐述了对流层不同波长激光的大气折射率。