Light from a helium-neon laser lambda 633 nm is incident, Ask an Expert

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Light from a helium-neon laser (λ =633 nm ) is incident on a single slit. What is the largest slit width for which there are no minima in the diffraction pattern?

The answer is in meters. Wouldn't the largest slit width be infinite, since the larger the slit, the more light can go through and the less it would diffract?

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