Light from a helium-neon laser wavelength649 nm passes
Light from a helium-neon laser (wavelength=649 nm) passes through a circular aperture and is observed on a screen 2.36 m behind the aperture. The width of the central maximum is 3.03 cm. What is the diameter (in mm) of the hole?
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Light from a helium-neon laser (wavelength=649 nm) passes through a circular aperture and is observed on a screen 2.36 m behind the aperture
A 1.09-cm-diameter microscope objective has a focal length of 2.4 mm. It is used in visible light with a wavelength of 516 nm. What is the objective's resolving power if used in air
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