By how much has the child reduced the pressure

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Q. For a double-slit experiment with slit spacing 0.2 and wavelength 600, at what angular position is the path difference equal to one-fourth the wavelength?

Q. A child attempts to drink water through a 110 cm long straw, other than finds that the water rises only 90cm. By how much has the child reduced the pressure in her mouth below atmospheric pressure?

Reference no: EM1385249

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By how much has the child reduced the pressure : For a double-slit experiment with slit spacing 0.2 and wavelength 600, at what angular position is the path difference equal to one-fourth the wavelength.
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