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spectra n.spectrum 的復數。

spectral

Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness . 旋渦星云因為非常暗,難以得到它們的清晰的光譜。

Experimental configurations for measuring and displaying these spectra are sketched in figure 13.7 . 測量和顯示這幾種頻譜的實驗裝置見圖13.7。

It includes the stipulation that the phase spectrum over that range should be a straight line . 它包括了在該范圍上相位譜應為直線的規定。

We begin to see, from this material, how to visualize a waveform from its spectrum . 從這些分析中初步看到,如何從它的譜構思出該波形來。

Motion of a star across the line of sight causes no change in its spectrum . 恒星橫越視線方向的運動,在它的光譜中不會引起什么變化。

It is possible to describe the excitation spectra in terms of elementary modes of excitation . 可以借助于基本激發模式來描述激發譜。

Trade integration is part of the larger spectrum of types of economic integration . 貿易一體化是范圍較大的各種經濟一體化的一部分。

Several different names have emerged to characterize different parts of the spectrum . 幾個不同的名稱用來表示電磁波譜的不同部分。

A star that has this kind of spectrum reveals at once something of its structure . 具有這種光譜的恒星,馬上就展示出它的一些結構。

This relation between the frequency and the field spectra was noted experimentally . 實驗上已經發現頻率和場頻譜之間的這種關系。

It was surprising when the alkali spectra showed unmistakable doublets . 當堿金屬光譜顯示出不容懷疑的雙線結構時,是令人驚奇的。

The range of the spectrum in which heat is radiated mostly lies within the infrared portion . 輻射熱的光譜段大部分落在紅外區。

These clouds show spectra remarkably similar to those of the illuminating star . 這些云的光譜與照射它的亮星的光譜極其相似。

In practice the identification of lines in a star's spectrum is not so easy . 實際上,要辨認恒星光譜中的譜線并不那么容易。

At the same time broaden the spectrum as result of energy loss fluctuations . 與此同時,電子譜由于能量損失的漲落而展寬。

White light can be split by a prism into a whole spectrum of wavelengths . 白光可以用棱鏡分解成具有各種波長的整個光譜。

The electromagnetic spectrum covers an enormous range of frequencies and energies . 電磁波譜包括極大的頻率和能量范圍。

If the stellar spectrum is known, the albedo of the dust can be obtained . 如果恒星的光譜已知,就可得出塵埃的反照率。

A particular spectrum line corresponds to a certain definite light wavelength . 某特定的譜線就代表一個確定光的波長。