What is the wavelength of the laser pointer light

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Reference no: EM13987502

A beam (diameter 1.2 mm) from a laser pointer is bounced off a polished steel ruler with one millimetre wide divisions etched into the steel. A diffraction pattern is observed on a screen 20m away from the ruler, and the distance between the central bright fringe and the fifth dark fringe on either side is 7.32 cm. what is the wavelength of the laser pointer light?

Reference no: EM13987502

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