eter The actual analysis and measurement of light is done by a spectrometer. For
ID: 2304817 • Letter: E
Question
eter The actual analysis and measurement of light is done by a spectrometer. For a to permit wavelength determinations it must perform two tasks: spectrom Resolve (separate) the incoming light into component colors. Provide the mechanism for associating the appearance of a particular colo wavelength 1. 2. As shown below, a spectrometer consists of three basie components: the collimator, diffracting element, and the telescope. The platform on which the accommodate a triangular glass prism. diffraction grating sits could just as easily TELESCOPE RED LIGHT COLLIMATOR SLIT COLLIMATOR ANGLE OF DIFFRACTION LIGHT SOURCE GREEN LIGHT PARALLEL BEAM DIFFRACTION GRATING (OR PRISM) The light to be analyzed enters the collimator through a narrow slit positioned at the focal point of the collimator lens Problem 1o: [1 pt] What is the purpose of the narrow slit?Explanation / Answer
The use of the narrow slit is to ensure that only the diverging wavefronts pass through this aperture. This can be done if the aperture itself is made small in size. This then ensures that the light is in focus (it is the same reason by cameras use a pinhole for sharp images) for perfect collimation through the lens placed later on ahead.
If the light source would have been an ideal point source, then the narrow slit would have been redundant.
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