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how do you measure wavelength with a spectrometer?

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euan | 19:40 Thu 10th May 2007 | Science
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I know that you can measure wavelength with a spectrometer, but havnt been able to find out how..
Thanks in advance
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Avatar Image Teddio
You need to measure the diffraction angle in degrees (theta) and have the line spacing for the diffraction grating (d) The wavelength of the light will be d multiplied by the sine of angle theta. This is for first order only.
20:08 Thu 10th May 2007

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