What is the relation between the dispersive power, D, of a grating an – McqOptions

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1.	What is the relation between the dispersive power, D, of a grating and the order, n, of a spectrum?
A.	D ∝ n
B.	D ∝ N2
C.	D ∝ 1/n
D.	D ∝ 1/N2
Answer» B. D ∝ N2

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