f a light wavelength of 632 nm illuminates a zone plate; what is the first zone radius relative to a point 30 cm from the zone plate on the central axis ? How many half-period zones are contained in an aperture with a radius 1000 times larger.
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f a light wavelength of 632 nm illuminates a zone plate; what is the first zone radius relative to a point 30 cm from the zone plate on the central axis ? How many half-period zones are contained in an aperture with a radius 1000 times larger.
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