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Diffraction Grating

AQA AS-level PhysicsOpticsLesson 25 of 27

A diffraction grating is a plate with closely spaced parallel slits ruled on it.

A parallel beam of monochromatic light directed normally.

Light passing through each slit is diffracted.

Diagram

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Key terms in this lesson

Diffraction
The spreading out of waves as they pass through a gap or around an obstacle.

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