White light strikes a diffraction grating a rainbow appears


(a) White light strikes a diffraction grating. A rainbow appears on a wall just below the direction of the horizontal incident beam. Determine the color of the top of the rainbow?

(b) White light strikes a prism. A rainbow appears on a wall just below the direction of the horizontal incident beam. Determine the color of the top of the rainbow?

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Physics: White light strikes a diffraction grating a rainbow appears
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