3) What is a reflection grating?
Ans: A diffraction grating in which the grooves are ruled in a reflective coating. The grating may be either plane or concave, the latter being able to focus light. The incident and diffracted rays lies on same side of the grating.
Ans: A diffraction grating in which the grooves are ruled in a reflective coating. The grating may be either plane or concave, the latter being able to focus light. The incident and diffracted rays lies on same side of the grating.
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