Mapping wavelength with the grating position

• A plot of the wavelength against the grating position and the position on the CCD can be seen below:

• This process was repeated for the Cadmium, Low and High pressure Mercury lamps
• The values of the constants were found to be

• The plots below shows that the width of the line increases towards the edge of the frame.
• These plots show a scan of a peak in the helium and cadmium spectrum.

Convolution with Fourier Transform

• To try to speed up the fitting of the convolution Fourier transfrms were used to convolute the functions instead.

• and
• This seems a very small error?
• when plotted they are not visible

• The , which is very large however even the best fit points don't go through the error bars, as shown below: