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a beam of laser light of wavelength 632.8 nm has a circular cross section 2mm in diameter . A rectangular aperture is to be placed in the centre of the beam so that when the light falls on the wall 4.5m away the central maximum fills a rectangle 110mm wide and 6mm high. The dimension are measured between bracketing the central maximum . Find the required width and height of the aperture.

a beam of laser light of wavelength 632.8 nm has a circular cross section 2mm in diameter . A rectangular aperture is to be placed in the centre of the beam so that when the light falls on the wall 4.5m away the central maximum fills a rectangle 110mm wide and 6mm high. The dimension are measured between bracketing the central maximum . Find the required width and height of the aperture.

Grade:12th Pass

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