give the observation table to determine wavelength of monochromatic light using laser
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Method:
1. Set up apparatus as shown in diagram.
2. Adjust the spectrometer as follows:
- make sure cross threads are in focus and upright
- focus on a distant object to ensure parallel beams
- illuminate the slit and focus on slit
- adjust the width of the slit to get a narrow beam
-- level the turntable
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