When will be the mirror effect valid$

1.	When will be the mirror effect valid$
A.	‚âà√≠‚Äö√¢¬ß‚Äö√Ñ√∂‚àö¬¢¬¨¬•1
B.	‚âà√≠‚Äö√¢¬ß=1
C.	‚âà√≠‚Äö√¢¬ß<1
D.	‚âà√≠‚Äö√¢¬ß‚Äö√Ñ√∂‚àö¬¢‚Äö√Ñ‚Ä†1
Answer» B. ‚âà√≠‚Äö√¢¬ß=1

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