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A diffraction grating has 1.3 ?m spacing. Find the first-order diffraction angles for the following wavelengths....

A diffraction grating has 1.3 ?m spacing. Find the first-order diffraction angles for the following wavelengths.

Part A: Find the first-order diffraction angles for orange light (615 nm ).

Part B: Find the first-order diffraction angles for green light (540 nm ).

Part C: Find the first-order diffraction angles for red light (680 nm ).

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