For what distance is ray optics a good approximation when the aperture is 4 mm wide and the wavelength is 500 nm?A. 22 mB. 32 mC. 42 mD. 52 m

For what distance is ray optics a good approximation when the aperture

1.	For what distance is ray optics a good approximation when the aperture is 4 mm wide and the wavelength is 500 nm?A. 22 mB. 32 mC. 42 mD. 52 m
Answer» Correct Answer - B Fresnel distance, `z_(F)=(a^(2))/(lambda)=((4xx10^(-3))^(2))/(500 xx 10^(-9))` ` :. z_(F)=32m`

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For what distance is ray optics a good approximation when the aperture is 4 mm wide and the wavelength is 500 nm?A. 22 mB. 32 mC. 42 mD. 52 m

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