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Bell Jar Experiment Bell Only stopcock Diffraction Grating is used for Diffraction Grating is used for demonstrating the principle of diffraction and the way in which its properties are dependent upon the number of lines per unit length 2 microns) prevents aerosol contamination and liquids from accidental liquid entry This pump plate and bell jar can be used to demonstrate the nature of sound waves by showing that sound does not exist in a vacuum A Bell Jar Experiment Kit (Bell Only) which takes its name from its conical form
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