Figure shows the central part of the interference pattern for a pure wavelength of red light projected onto a double slit. The pattern is actually a combination of single slit and double slit interference. Note that the bright spots are evenly spaced. Is this a double slit or single slit characteristic? Note that some of the bright spots are dim on either side of the center. Is this a single slit or double slit characteristic? Which is smaller, the slit width or the separation between slits? Explain your responses.
The double-slit interference pattern is distinguished by its evenly spaced bright spots and the single slit pattern is characterized by the absence of bright spots. The slit spacing is smaller than the slit width.
The distance between identical spots between two subsequent waves is computed using the wavelength attribute of a wave.
The double-slit interference pattern is distinguished by its evenly spaced bright spots.
The single slit pattern is characterized by the absence of bright spots.
The slight gap is more than the slight breadth because the equally spaced bright spots are smaller. That is, the slit spacing is smaller than the slit width.
Consider a spectrometer based on a diffraction grating. Construct a problem in which you calculate the distance between two wavelengths of electromagnetic radiation in your spectrometer. Among the things to be considered are the wavelengths you wish to be able to distinguish, the number of lines per meter on the diffraction grating, and the distance from the grating to the screen or detector. Discuss the practicality of the device in terms of being able to discern between wavelengths of interest.
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