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Technical data Diffraction at a grating with laserArticle no: P1195901
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Principle By carrying out this experiment using transmission gratings with largely differing grating constants, the students should gain an understanding of how these affect the interference pattern. Establishing the wavelength λ of light filtered with the red filter is a by-product of the experiment which could prompt consideration of error, since the individual measurements will result in differing values for the wavelength λ. Benefits
Tasks How does the grating constant affect the diffraction pattern of the grating? Using transmission gratings with different grating constants, investigate the relationship between the grating constant g and the distance d of the interference fringes.
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www.phywe.com

