Question: A venetian blind is essentially a diffraction gratingnot for visible light, but for waves with much longer wave-lengths. If the spacing between the slats of

A venetian blind is essentially a diffraction grating—not for visible light, but for waves with much longer wave-lengths. If the spacing between the slats of a blind is 2.5 cm,
(a) For what wavelength would there be a first-order maximum at an angle of 10o, and
(b) What type of radiation is this?

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