波长

• Wave speed equals frequency times wavelength .
  波速等于频率乘以波长。
• That is, light of all wavelengths is present .
  就是说，各种波长的光都存在。
• Waves are all the same length and move in step .
  所有波的波长均相同，而且同步。
• The opacity is a function of temperature and wavelength .
  暗度是温度与波长的函数。
• The light is dispersed into its component wave lengths .
  光被色散成各种波长的单色光。
• The absorption coefficient is often strongly wavelength-dependent .
  吸收系数往往与波长密切相关。
• The spectrum is just an image of the star in various wave lengths .
  光谱正好是恒星在各个波长处的象。
• Such wave fronts are separated from one another by one-half wavelength .
  这种波阵面彼此间隔半个波长。
• The shorter the waves are, the more distinct will be the magnified image .
  波长越短，放大的物象越清晰。
• Stars emit light which contains only certain characteristic wavelengths .
  恒星发出的光只含有特定的波长。