neon spectra by transmission grating
Physikfan, Tue Oct 25 2016, 01:10PMAnalog to the experiment: "neon spectra by direct vision prism" the direct vision prism was replaced by a transmission grating:
Exposure time as 1/10 second, plus zero order
Exposure time about 1 second, plus zero order
In these grating spectra the light source is also visible as the so called zero order of diffraction.
With increasing exposure time, the faint lines in green and blue are also visible,
however, the strong red lines are then overexposed.
This "fine structure" of the Neon spectral lines is an artifact and is due to the fact that simply the Neon discharge inside a capillary tube was used as an "entrance slit".
Re: neon spectra by transmission grating
Physikfan, Tue Oct 25 2016, 01:20PM
In this posting, only the neon spectra are shown without the light source (zero order):
Exposure time about 1/10 of a second
Exposure time about 1 second
With increasing exposure time, the faint lines in green and blue are visible,
however, the strong red lines are then overexposed.
This "fine structure" of the Neon spectral lines is an artifact and is due to the fact that simply the Neon discharge inside a capillary tube was used as an "entrance slit".
Physikfan, Tue Oct 25 2016, 01:20PM
In this posting, only the neon spectra are shown without the light source (zero order):
Exposure time about 1/10 of a second
Exposure time about 1 second
With increasing exposure time, the faint lines in green and blue are visible,
however, the strong red lines are then overexposed.
This "fine structure" of the Neon spectral lines is an artifact and is due to the fact that simply the Neon discharge inside a capillary tube was used as an "entrance slit".
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