单词	spectroscope
释义	spectroscope An optical instrument that produces a spectrum for visual observation. The first such instrument was made by R. W. Bunsen; in its simplest form it consists of a hollow tube with a slit at one end by which the light enters and a collimating lens at the other end to produce a parallel beam, a prism to disperse the light, and a telescope for viewing the spectrum (see illustration). In the spectrograph , the spectroscope is provided with a camera to record the spectrum. For a broad range of spectroscopic work, from the ultraviolet to the infrared, a diffraction grating is used instead of a prism. See also spectrometer. Spectroscope
随便看	quartz quartz clock quasars quasicrystal quasiparticle quasiperiodicity quenching r.a.m. racemic mixture rad radar radial velocity radian radiance radiant energy radiant exitance radiant flux radiant intensity radiation radiation belts radiation damage radiation pressure radiation temperature radiation units radiationless decay

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