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Diffraction Grating Potential Errors

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Submitted By warjar101
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Diffraction Grating Lab 11

Possible Sources of Error:

1) Select this If measurements are used,
Most measurements require you to estimate one significant figure. This estimation is frequently different if done repeatedly, especially if done by different people, and introduces "random error".
Systematic error will come from an error in your measuring apparatus. Maybe your vernier is not zeroed. Maybe the diffraction grating is cheap and the lines/cm is not accurate, etc.So every measurement will be in error because of inaccurate instruments 2) Misreading the vernier scale. Not seeing the maximum left angle or right angle spectra, thus the average angle calculation doesn't match with the right wavelength for mercury. Difficulty in seeing the lines through the telescope. 3) Error in the number of slits per meter: the error in slit width is what causes the error in the number of slits per metre, so the proportional errors are the same. 4) Distance between light source and the surface
Size of the light source
Attenuation as it passes through air 5) If The measurement of the grating constant from relection off the meter scale was slightly more error-prone use this: Factors that might account for the error are irregularities in the grating, mistakes in the calibration, or similar systematic flaws.

In this section you can include general statements saying: * Whether your measurements confirm the stated objectives. * What fundamental physical laws were illustrated by the experiment * How the experimental error could have been reduced in the experiment.
Also include a constructive critique of the lab, stating what went well, what didn’t, and how the laboratory could be improved.
Error Analysis Questions
How was  related to the angle of diffraction? How is  related to the color of the line? Was the wavelength of a particular

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