Diffraction occurs for all types of waves, including sound waves. High-frequency sound from a distant source with wavelength 8.70 cm passes through a narrow slit 12.5 cm wide. A microphone is placed 45.0 cm directly in front of the center of the slit, corresponding to point O in the figure 36.5a in the textbook. The microphone is then moved in a direction perpendicular to the line from the center of the slit to point O.At what minimal distance from O will the intensity detected by the microphone be zero?
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