Extinction ratio is denoted by symbol __________$

1.	Extinction ratio is denoted by symbol __________$
A.	‚âà√≠¬¨¬µ
B.	‚âà√¨‚àö√¢
C.	‚âà√≠‚Äö√¢¬ß
D.	‚âà√¨‚àö√ñ
Answer» B. ‚âà√¨‚àö√¢

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