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Full set of Notes with Fill-Ins - San Jose State University

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Chem 155 Unit 6 Page 125 <strong>of</strong> 316Effective bandwidthThe combination <strong>of</strong> exit slit width and dispersiondetermine Δλ EFF – the effective bandwidth <strong>of</strong> themonochromator. Δλ EFF is a number, in units <strong>of</strong> nm,equal to the range <strong>of</strong> wavelengths that exit themonochromator at any one time.Δλ EFF = wD -1W = slit width in mmD -1 = dispersion in nm / mmΔλ EFF is controlled in part by:the exit slit width - wW = slit width in mmD -1 = dispersion in nm / mmΔλ EFF ≈15 nm300 400 500 600 700Δλ EFF ≈2 nm300 400 500 600 700Page 125 <strong>of</strong> 316λ / nm

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