Slit width order of wavelength

jd12345 · Feb 22, 2012

In diffraction why the slit width has to be the order of wavelength of wave? I don't understand. The smaller the width of the slit i think the more effective diffraction becomes.
Why the width has to be order of the wavelength?

Claude Bile · Feb 24, 2012

It doesn't. It can be much smaller or much larger. Diffraction theory can easily account for both.

Look up "Kirchoff integral theorem".

Claude.

Slit width order of wavelength

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Slit width order of wavelength

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